What is the Best Caliber for your SBR?

[@onepathofreason1]

This is really awesome that you are using a new block for each round. Thank you for incurring the expense to bring us this much education and entertainment (edutainment).

[@GarandThumb]

we do our best!

[@michaelstanton8363]

@@GarandThumb use 125 grain for the rattler at range

[@richardmueller7023]

Thanks GT and crew! You guys really do make my Sunday mornings, to the point where I look forward to your videos. Stay awesome guys!

[@frozennorth6527]

@@michaelstanton8363 110-125gr can do 500 pretty decent. Most people get it for for subsonic capability though, a lot of people sleep on the supers though. 10.5 seems to be absolute witchcraft for mine.

[@matthewmason831]

Yeah that was amazing, it’s so much easier on the viewers so see the performance. Must be very expensive.

[@MigratoryWhimbrel]

For those of us trying to keep track of which guns are being used: Mark 18 -- 10.3 inch barrel, 5.56 mm Quickhatch -- 8.1 inch barrel, 5.45 mm SIG Rattler -- 5.5 inch barrel, 300 blk Arsenal _SAM7K_ -SLR- -- 8.3 inch barrel, 7.62 mm FAL OSW -- 11 inch barrel, .308

[@nicholascecil6733]

About 10 minutes in, he said something about the O2 self igniting in the wound channel? Can someone please explain or help me understand?

[@guillainbarre1]

search for diesel effect @@nicholascecil6733

[@Sophisticlesenergy]

​@nicholascecil6733 so when a round enters a body cavity at extremely high speeds it forces the flesh to expand due to gasses spiraling the round and Hydro-Kinetic displacement. That's a principle of energy transfer involving fluid. When the temporary wound cavity is created the fluid then rushes in to close the vacuum created. Compression of oxygen within a vacuum causes ignition.

[@BadHaddy]

@@nicholascecil6733 He's probably referring to one of the many theories about the light emissions of ballistic gel when impacted by a projectile. It is GENERALLY believed to be a Sonoluminescence event, others believe is is some sort of dieseling of a fuel source in the gel itself. It's been generally studied, and is easily observed, but not rigorously investigated and published in a peer reviewed journal to the point of reaching consensus. It is not observed in organic ballistics gel (gelatin.)

[@Sophisticlesenergy]

My issue here is that i think they went very short on the 300 blk barrel, I would have liked to see at least a 9 inch barrel tested. Preferably a 10.5 but to my knowledge 5 is not the most common 300blk barrel length. Would just love to see 5.56 and 300 blk tested at the same 10.5 barrel length, bet the 300 blk stomps it.

[@joek5352]

Would really like to see the 300 black tested with supersonic ammo. Using subs in one caliber and supers in the rest is not an apples to apples comparison.

[@nostaw100]

I agree and he used a 5 inch barrel thats a nudered round at 5 inches its widely agreed 8 inch is the shortest you should go for 300 and most people like myself use 10 inch for 300 and 12 - 14 for 5.56 you get the optimal ballistics to length ratio from the calibers that way

[@joek5352]

@@nostaw100Totally agree. In theory, the can should add some additional velocity, but not enough to make up for the ridiculously short barrel length.

[@omegaalpha2974]

300 blackout & possibly 8.6 are it( assuming that you use supers for long range ).

[@smokingcrab2290]

Supersonic blk defeats the purpose of the round imo. The round was made for maximum signature reduction. Supersonic does not facilitate that purpose.

[@SlavaUkraini1114]

@@smokingcrab2290 it's an option, but what makes 300 blk so good is that it's multipurpose, you can use subs for quiet shooting, but you can also switch to supers with nothing more than a reload.

[@matthewmason831]

Damn, .300 blackout should’ve had supersonic options tested too. Great video!

[@GarandThumb]

next time for sure!

[@CiviTac]

300blk is really designed for subs. It makes more sense to run a mk18 then 300blk imo when we are talking full power rounds

[@WayStedYou]

​@CiviTac dunno. Some of the results with a higher speed 300 blk would probably outpace the 5.56 with such a short barrel due to powder burn and you push the energy way up vs the 200 grain subs

[@CiviTac]

@@WayStedYou with the weight differences and the lethality of both being comparable at full power id take 556 every time for a “combat loadout” with an sbr. No hate against the 300blk but I’ve never met someone who buys that caliber for their main squeeze. It’s always a niche gun like for gooning and home defense.

[@prelude2tube]

​@@CiviTacif you're looking for big damage out of a short barrel, 300blk supers (especially in a soft-target / hunting round) are not to be underestimated. AAC's Sabre black tips are devastating from a short barrel, and (like for like, surpressed or not) are still meaningfully quieter than the mk18.

[@tiredoldman]

.300 Blackout is probably one of the most effective round for an SBR. It was designed for that purpose. I’ve used various SBR’s during my time in the Corps and even own a few. The SBR is meant for close quarters and short ranges. I really appreciate the video though. It’s especially helpful for those who are new or have little experience with SBR’s. I watch your videos often, this is just one of the rare occasions I have something I think is useful to add.

[@robertkaschner1655]

I've tried the 300 blackout and I'm just not sold on it being a great performer. .45 hollow points and 12 gauge buck are pretty hard to beat. That said, 300 blackout is always on the shelves and can share parts and cans so maybe it is worth building one again.

[@mannamedbanjo]

The advantage is you can get supers, subs of so many different grain weights. It's a jack of all trades ammo.

[@carsonhunt4642]

Lol. You mean it’s the most effective for subsonic? It quite literally has the same impact ballistics as using a .45 pistol. We all know pistols don’t drop ppl the same way rifles do.

[@officecomputer8887]

lmfaoooo you talk about your time in the corps but not about your time on red it?

[@TheCelestialWolf]

@@carsonhunt4642 Subs are for use with cans and replace PCCs. If you want full performance, Supers are terminally superior to 5.56 within 300 yards depending on bullet and load used. The fun part is that you can go from PCC quiet to a real rifle power with just a mag swap. I probably wouldn't run supers from a 5.5 inch barrel though. If you want a do it all 300BLK, use a 9" or 10.5". If you want a PCC, but better, use a 7.5" or shorter barrel. If you want to use mostly supers, run a 16". 300BLK keeps gaining velocity even with longer barrels. It is for sure the best SBR cartridge for anything you would use an SBR for. If you need more range, use a 6ARC or 6.5 Grendal. More boom? Use a 450Bushmaster or 458Socom. You want cheap ammo? Use a 5.56. At this point, there are so many better options out there that the only reason to still run a 5.56 is if you already have the guns and ammo or if you just can't afford anything else.

[@THEchefdoggy]

"You poor fuckers" - The most relatable comment GT has ever made. Thank you for always being a man of the people, by the people, and for the people.

[@tomi6261]

Team 300 Black here. Being able to instantly switch from crazy quiet subs to very respectable supers, without having to change a thing on my gun, makes it the most versatile for me. Caveat - I hardly ever shoot past 300-350 yards.

[@DaveSmith-cp5kj]

Even if you shoot out to 800m you are good. Travis Haley a decade ago did a video of him shooting that far with an aimpoint which is wild. With a LPVO it is well within your capability no problem.

[@Captain_Coleslaw]

300blk is essentially a 308 round i think? So with the correct power behind it, its the same as a SBR 308?

[@cody180sx]

@Captain_Coleslaw 300 Blackout/7.62x35 is a .308 bullet in A .223 case, not as much powder behind means not as much ass behind it as a .308

[@tomi6261]

@@Captain_Coleslaw Excellent point, that I unfortunately can not confirm. I do not know the true ballistics of the 308 in an SBR. The barrel length would of course have everything to do with the results. I can tell you that out of my 6.75" barrel, my handloads are accurately running: 220gr Berrys subs at 1025 fps, calculated at 513 ft lbs at the muzzle. And my 125gr Speer supers are running 2000fps which results in 1110 ft lbs. And 110gr Hornadys at 2150 fps, which comes to 1129 ft lbs. You can compare these to whatever numbers you find from a 308 SBR. But, the physical size and weight difference of the weapon and ammo still makes the 300 BO a crazy good choice for me UNLESS you are shooting very long ranges.

[@tomi6261]

@@cody180sx You are probably correct in the category of supersonic full power loads. But if shooting subs, a 220gr 300 BO will outperform the 308 in any and every recipe simply because you can not safely load a 220gr bullet in a 308 case due to pressures. For supers, a short barrel (like 6"-8") will neuter the ever loving hell out of a full power 308 round so it may be closer than you think though. Plus, the recoil, report and blast of the 308 will be pure hell. "If you shoot this at night and you will die" Lol.

[@MrBossuporbowout]

This was one of the most subtly funny yet informative videos I've seen. Great job guys

[@TheTopGun920]

300 Blackout is my preferred round for SBR, but man 308 is such a beast.

[@timewave02012]

Supersonic, though. Subsonic is neat if you need to be extra sneaky, but for most applications, especially self defense, supers win.

[@user-yt5uw4kh5u]

@@timewave02012 agreed

[@EarthAltar]

Check out the IWI Tavor bullpup in .308. 16.5" barrel with an overall length of about 29". There you'll get almost full velocity out of the round in a similar sized package as an SBR. Around two grand.

[@echofoxtrotwhiskey1595]

@@timewave02012Depends on context. Supersonics are awesome no doubt, but sometimes you don’t want everyone in a 2-3 block radius knowing you just discharged a firearm.

[@Infidel5723]

I have a 10.3 in 308 🙃

[@B0SS5]

12 inch 6.5 grendel is the best in my opinion you get that great accuracy at distance and crazy good knockdown power in a small ar-15 package

[@GravelGuerrilla]

6.5G is good because of the wolf ammo being cheap. But, these rounds really excel with higher quality ammo and long barrels. I feel like it's a 5 cylinder engine, in a world with 6 cylinders and 4 cylinders and turbos and superchargers available. The advantages are there but, so damn subtle that you might as well reach the peak performance. And if you're there, just buy a 6 ARC or a 6 creedmore. You'll beat the 6.5G guy every time.

[@tommygunn3260]

Video suggestion: if there’s a SHTF situation and you can ONLY grab 1 rifle & 1 pistol, what are they? And what’s your kit? I think lots of us wanna know!

[@Zamotak]

A solid Gas Piston AR15 in 5.56 and a Glock 19. Ammo would be extremely common and replacement parts for both would be rather common as well.

[@Tranitus3]

Want this video

[@n0xxm3rcyxx]

its about that time.

[@m0rbidhusky]

I’d run an AR-15 and a glock 26. Very common guns & ammunition, and the 26 can take a greater variety of magazines than something like a glock 17/19.

[@MrLandslide84]

Something 5.56 (AR) and something 9mm for availability. Once you run out, you don't wanna have .224 valk/6mmARC or something else weird and have no gun if you are able to link up with someone.

[@Nono-rh4lr]

Great rundown. I would have loved to see what the SuperSonics would do out of the rattler. I know subs are popular for quiet but the 300 black runs well with suppers

[@mattjay6633]

Same! My home defense rifle is a 9” .300 with a surefire 300sps. Yeah subs are fun for range plinking, and some of the aggressive HP/expanding rounds would be great for “sentry work” or just staying quiet….. but primarily I would be using 110gr supers. Suppressor still makes it relatively comfortable to the ear, but you also get the benefits of a rifle round in regards to ballistics and capable distance….

[@TheDkb427]

@@mattjay6633 not that I've done it but you could possibly download a 110gr vmax or even the Barnes tac-tx to still expand but really quite. Think that would be around 1800fps or something. Would limit further out but still better than subs to me anyways. Hell anything over 125 just pokes 30 cal holes.

[@leftyeh6495]

If I want to go loud I'll just pick up a 5.56 with v-maxes. The blackout does subs quietly. I bought a can to be quiet. Supers are very not quiet through a can indoors. 😂 It can be a versatile round. It's just that many have tried to make it do a bunch of things it just doesn't do well. It really does quiet subs well, so let it be great there and quit compromising.

[@rickfinsta2951]

@@leftyeh6495 I disagree. 300blk out of an 8.1" barrel is nearly identical in external ballistics to a 7.62x39 in the AKM platform. Or you can think of it as a light 30-30 loading from a much shorter barrel. You get lower concussion when not suppressed, and suppressed with subs is quieter than a similar barrel length in 5.56x45. Also more barrier blind, etc. I never use subs in my 300 stuff it is a waste of good bullets LOL. 300blk is just about perfect for domestic (CONUS) law enforcement or self defense use. That said I'm not going to turn down a 11.5" 5.56 if it is handed to me, either.

[@chopinbloc]

​@@TheDkb427sorry, the 110gr VMAX stops expanding well above the speed of sound.

[@youtubesucks2369]

Ive never been more excited for Mike to show me the results of something so short !

[@xaxsimplexescapex]

they're actually perfectly average, more common than you think!

[@johndavid5862]

Ummmmmmmm......... you ARE still speaking about rifles..........., right?!? 😐

[@TalkingFlannel]

It’s pretty average, I think.

[@davolbc]

Remember you're supposed to measure a barrel from the bottom LOL.

[@davolbc]

Actually when you pull the trigger and shoot it only needs to travel about an inch to an inch and a half to have a devastating effect upon your life.

[@Rooobviously]

Every time that I go to order gun parts I hear Michah saying “primary arms” in my head so that’s where I order things from now.

[@frosty3693]

I have two PA 1x6 FFP ACSS scopes for 7.62x39, quite versatile depending on what ranges you shoot. Thinking about their prizm site for my next build.

[@theKashConnoisseur]

Doesn't hurt that they're a solid company that stands behind their products, either.

[@DevDog67]

​@@frosty3693their micro prisms are way better than they have any right up be for $300. It's kind of insane. Plus the motion on/off is pretty sick.

[@T-SwiftsMaritalAid]

I’m gonna stay clear of PA from now on tho. Have a slx 1-6 lpvo that won’t zero. Won’t even hit on the paper

[@fmlymn1]

I have 6 of their products and am happy with them for the price point

[@eljefeamericano4308]

Great video. It's a shame the 7.62x39 rifle was being so fussy. I'm partial to that caliber in shorter barrel lengths.

[@PNWhashmits]

X39 from a 10.5" FTW

[@twelvepercentitalian2511]

I wouldn’t be worried about it.

[@Min4Mass]

Its the 300 blackout we have at home.

[@Pienimusta]

If you have been struggling in your life with a short barrel, hit that subscribe button.

[@Token_Black_Guy]

Just get nore pumps in big bro

[@ALovelyBunchOfDragonballz]

If you ever feel bad about your short barrel, just remember that in some cultures shorter barrels indicate superiority 😆

[@RussXnimbusX]

I may have a pencil barrel, but I can write War and Peace with it.

[@dynasty2295]

What if your barrel changes depending on how hot your rounds are? 🤔

[@varuug]

@@dynasty2295 It's modular.

[@mitchellstiles3260]

“But I know you poor fuckers are probably firing the cheap ammo.” He knows his followers😂

[@nicholasdangelo8174]

Wow, this is an amazing vid sir. Absolutely stunning the results with the 545. 556 also very stout on the gel. 300blkout punching through the block was awesome and 308 did work on the block! Awesome content this was great thank you!

[@CatTechSupport]

300 and 8.6 Blackout are the quietest options you have.

[@GarandThumb]

big facts

[@ItsBiscoitoIndeed]

​@@GarandThumbscience has occured

[@brandonrupp5880]

I haven't heard that.

[@nomad5454]

True but from a practical point I'd only run 8.6 as a. Bolt setup trying too stock 1000+ rounds at that price for ar is crazy

[@xxxlonewolf49]

Bayonet is the quietest caliber

[@cosmicbilly]

Garand thumb has been killing it with these uploads! This dude never fails. Keep it up bro, i love your channel so much.

[@mitchculpepper738]

Being a 6.5 Grendel fan, I’m curious what it would do out of 11.5” barrel. With muzzle velocities of 2300+ fps with 120 gr. bullet and 2500+ fps with 90 gr. Varmint nightmare, it seems this would excel in your test.

[@nickadkins7765]

Definitely would have liked to see a 110gr barnes tac tx round out of an 8 inch +/- barrel on the 300 black out for comparison! I'm sure the ballistics, effective range, and certainly the weight would have changed significantly.

[@Rotakor]

I agree with this 100%. I would also of liked the 10.5 inch barrel.

[@bona-fide-mtm]

Agreed

[@sfdclay]

Agreed, 300BLK is a true dual purpose caliber, having similar performance to 762x39 when using supers, yet being the only option for subs

[@goawaybaizuo]

Definitely agree with the 8" barrel. I think thats way more common than a 5.5.

[@leftyeh6495]

10" barrel is supposed to be the best velocity wise as powder should be burned by 9-10" for sub loads. If you're shooting supers you may as well have a 16-18" barrel and get the velocity.

[@marshmellowboy323]

The informational and gear videos will always be my favorite, thank you for the knowledge Mr. Thumb

[@columbiawarmachine9795]

I love my colt 11 inch barrel sbr

[@Anom711]

Awesome video! Would have been interesting to see how a SBS 12 gauge would have compared the the various rifles.

[@Rolf97]

Everyone always asks, "Where is Charlie?", and not "How is Charlie?"

[@jacobkean03]

The 5.56 never ceases to surprise me with its combat effectiveness but now that I got myself an ol lady and two daughters I’ve swapped to the .300 blackout for home defense considering the most common threats I have are the desperate tweakers and coyotes going after the livestock. The concrete test kind of changes my thoughts on the penetrating power of the 5.56 compared to the .300 blackout.

[@jeb6361]

Where do you have steel in your house?@@thejoatmoo

[@neglectfulsausage7689]

shielding on spacecraft is meant to stop 10 km/s bullets of meteorites. Mass still matters. @@thejoatmoo

[@jonah8133]

@@thejoatmoo Yeahp, I've seen tests where certain barriers are hardly dented by 300 blackout whereas 556 had some serious penetration

[@dababcock9]

With home defense as the primary intent, being able to shoot through barriers and still have good performance is not always considered a good thing. Usually, with home defense, the object is to have something that's effective enough to quickly incapacitate the attacker(s), while not having a tendency to over-penetrate, so as to hopefully not be a threat to the neighbors. You also need to positively identify the bad guy before you pull the trigger. Generally, legally speaking, the last thing that you need to be worried about is shooting through walls to get the bad guy(s). That's gotten a good number of people in serious trouble when what they thought was the bad guy... wasn't. I know that 5.56 (depending on barrel length and bullet selection) often tends to start to upset when it hits the first layer of drywall. It's still effective at getting the "bad guy", but an errant shot is less likely to go through multiple walls, unlike the 9mm (which is one of the major reasons why most SWAT teams have switched from the MP5 to the AR platform in 5.56). So far, I haven't seen similar tests on how different .300 blackout bullets perform in that kind of environment.... but I'm very interested in seeing any such tests.

[@jeb6361]

@@jonah8133 Where do you have steel in your house? Why are you interested in penetrating steel?

[@161monkey]

Welcome back Micah! So happy for you and your growing family!

[@alwarberigai5955]

I like how Mike casually threatened to fire Micah as a joke.. could have been real if he wanted it to…😮

[@161monkey]

Haha, I think Mikes loyal. Also, totally on brand for these two. #Bussin

[@lukeletkeman8835]

The accuracy issue on the AK wasn’t the ammo, it was the MRO😂

[@Citybreakdancerman10]

My thoughts exactly. I have that exact rifle with an MRO and it was my problem haha

[@GarandThumb]

lol damn. Just my luck. Although not my fav its been solid for 6ish years

[@K-bob_45]

You know AK’s are notorious for have bore to bullet size mismatch due to being made all over creation by every country ever right?

[@morphius747]

Had some guy tell me that too, .311 bore in Russian/Euro Ak's but we shoot .308 bullets from our Tula or Winchester (American)ammo @@K-bob_45

[@investigativeoutcomes9343]

not in America. lol@@K-bob_45

[@grizzlyadamsmtb3012]

I built a .300 blackout with a 10.5 inch barrel shooting 220 subsonic. So much fun I love it. Can’t wait to get a suppressor for it.

[@GUNNER67akaKelt]

Yeah, .300 BO would be my thought. The cartridge was designed for short barrels. Not sure why the comparison was with subsonics and not hypersonics. If you want to compare subsonics, they should all be subsonics. Hey, the .300 doesn't do as good as the rest. Wow, who saw that coming, right? Next comparison: why they the 9mm doesn't measure up to the .308.

[@XxxSIGMA_SUPERIORxxX]

300 BO deserves to be suppressed.

[@wasdawasda3849]

Would have loved to see .300 supersonics as well since that's the thing about being able to switch with a magazine change

[@GarandThumb]

yessir next video for sure

[@alexanderhaile6196]

Loving the SBR test data. Some video ideas... I'd like to see a video testing different kinds of 5.56x45mm (M193, M855, Mk262) through various short barrels, both against ballistic gel and common barriers (cinderblocks, wood, etc.) for CQB purposes. Then a test of M855 through different barrel lengths against Lv3 armor. Obviously M855 should defeat Lv3 armor, but through the shorter barrels the velocity would be decreased. I'm wondering how short the barrel can be before your use of M855 becomes irrelevant against Lv3 armor.

[@AldoSchmedack]

Me too on vest!

[@pops55650]

I love the .300 Blackout but it’s nice to see how it stacks up and what to expect, and not overhype its capabilities. All this raw data is pretty amazing,

[@somethingposerish5807]

This isn't a fair comparison. Should have used 150gr supers. Would have done way better in all tests Edit: also 8.5 or 9 inch barrel, not 5.5. They literally used the gimpest 300blk possible

[@michaelchristian8084]

@@somethingposerish5807I agree on the caliber grain. He said they were going with 55gr cause it’s the cheapest and most used and then goes with 220gr for 300blk which is not cheapest and most used. The 150 would have performed much better at the distance shooting and gel.

[@gVert404]

@@somethingposerish5807tbf the main purpose of 300blk is to be subsonic for suppression

[@painmt651]

I would rather have a 7.62x39, and just reload rounds for specific performance that is not obtainable from cheap factory ammunition. 300blk is too expensive.

[@twelvepercentitalian2511]

5.5 inch barrel for 300 blackbout is too short. 9.5 inch-10.5 is the sweet spot.

[@francisdotso8594]

Love the content, but would love to see more of the becoming deadly series come back

[@GarandThumb]

We are working on it

[@theKashConnoisseur]

@@GarandThumb I know it doesn't get as many views as some other content, but the information is invaluable, and that makes it evergreen content in a big way. Thanks for everything you and your team do for gun culture.

[@PoliticallyInsensitive]

​​@@theKashConnoisseurI read a bunch of comments like this last week and I'm still calling bullshit. Even the lowest view count was over a million iirc.

[@theKashConnoisseur]

@@PoliticallyInsensitive well, the commentary that the "becoming deadly" series didn't perform as well is based on GT's own comments he's made in podcast interviews. Views are great, but they don't always equate to financial success. And a million views might be a lot for one channel, but disappointing performance for another. It's not a dig on the content by any means, I find it highly valuable. But unfortunately being prepared is still a bit fringe even within the 2A space.

[@deand5602]

@@GarandThumb mega based, thank you mr. Thumb

[@BradMillsOK]

That gel impact with 308…. Wow lots of energy

[@alexwalker2582]

3-0-Hate is a standard for a reason.

[@Mandalore6311]

Loved the video. Fully admitting I am a .300 BLK fanboy, I feel the cartridge may have been done a disservice. In addition to being optimized for "short" barrels, one of the primary selling points is the wide range of bullet selection compared to other cartridges. Seeing the performance of supers in this video would have been nice. You maintain the advantages mentioned like excellent suppression at the muzzle, as well as low flash signature. That being said, it was a nice surprise seeing how it performed against the cinder block.

[@leftyeh6495]

You may as well have a 308 for anything but subs. The 300 is great for factory ammo selection in subs and supers. 308 is worth the jump to ar-10 if you're just shooting supers though. Suppressors and flash hiders are for noise or flash suppression. A bare barrel you're not going to know the difference.

[@somethingposerish5807]

​@leftyeh6495 nah, 300 is dope, 13grs of powder vs 45+, not to mention most of that 45+ is wasted. Also ease of brass collecting. I get so much 300blk brass from all the 556 guys who don't reload 😂 Edit: saw you mention jump to AR 10, to clarify, that defeats the purpose of cqb

[@Mandalore6311]

@@leftyeh6495 thanks for explaining suppressors and flash hiders to me? 300 BLK should be run suppressed, nobody mentioned bare muzzles.

[@Mandalore6311]

@@somethingposerish5807 not to mention the exact points from the video, .308 guns are heavier and the ammo is heavier.

[@bower31]

@@leftyeh6495 Yeah definitely not the weight and size of 308 is not always a worth while trade off. 300 supers preform really quite good, and you can carry a lot more of them.

[@granttetterton4491]

We need more of the becoming deadly series!!

[@wbhawkes]

Great, informative, fun video as usual. However, I really do wish you guys would try a 6.5 Grendel set of barrel lengths. In 12", it's supersonic to near 1,000 yards due to amazing BC - significantly better than any others you tested in this video, and it crushes the gel in close, gives you more rounds per pound than a 7.62x51, and overall is an amazing round for an SBR in a lightweight AR-15 platform.

[@LRRPFco52]

6.5 Grendel gives you better than SPR performance from Mk.18 sized CQBR. If I was to standardize all of my ARs, it would be my 12" 6.5 Grendel suppressed. I can out-shoot 24" hot-loaded .223 Rem bolt guns at distance, hunt, and still do HD and CQB with a compact blaster all-in-one.

[@wbhawkes]

Amen. Once you do some basic ballistics research on this surprisingly versatile and powerful cartridge, then actually buy and shoot one, it's very enlightening. I dismissed it for years for some reason, but am VERY SOLD on it now. I have decades of experience with many other AR-15 - and AR-10 rifles and cartridges, and am extremely impressed with the 6.5 Grendel - especially in a 12"-ish barrel length.

[@LRRPFco52]

@@wbhawkes I started with a 16" and wasn't impressed initially because I was fixated on muzzle velocity, not really looking at what it did downrange or appreciating the easy to manage sight picture during the shot. I noticed my nephews kept hitting my 12" steel poppers at distance with no misses, even though they have no shooting background. I built a Lilja barreled 17.6" and topped it with better glass and realized I could rapid-fire head shots at 600yds, and rapid-fire sub-MOA 6rd groups at 1000yds. That 17.6" Lilja is really light, like an old school M4A1 pre SOCOM barrel. I then did several 18", 20", 22" Lilja barrel builds with top-end components, then started looking at 12". I've spent the last 6 years shooting the 12" Grendel a lot in all my courses. I'm making 1st-round hits at 780yds, and even made 1st-round at 900yds on a 12" plate with that cheap 110gr PPU ammo. I normally shoot 123gr ELD-M through the 12", though it also does great with 90gr TNT, 120gr Federal OTM, and that 110gr PPU. 107gr and 110gr are really flat out of it.

[@wbhawkes]

I have a 123gr Hornady ELD-M load that out of my 12.5" 6.5 Grendel that has a very modest muzzle velocity of 2160 fps, but is supersonic to around 900 yards. That's crazy to me for such a compact, manageable package.

[@rubenjimenez5213]

The only thing about the 6.5 Grendel is price and availability, but I love it on an AR platform

[@evanwells6284]

Personally, I would pick supersonic 300 blk. Maybe a 110 or 125gr bullet. I think it wouldn't have any issues with lethality or short range drop, and it could probably get 90% of 16" barrel velocity out of the 5.5. but it would be loud.

[@jameslyddall]

Absolutely cracking video from you guys, have never fired anything more then a .22 round being from UK I would love to do some outdoor shooting/fitness sessions at some point in the states. Looking at booking some time off next year to see what courses are available.

[@bass779]

Hope you can make it!

[@FL-Kaiman]

Hell yeah bruv! Come across the pond!

[@musicman1eanda]

If you're a gun loving UK subject, please feel free to come over here to the US to become a citizen and switch places with one of our communist anti gun leftists 😊

[@charleseatherton7396]

You should move and stay here in the USA.

[@jameslyddall]

@@charleseatherton7396 I would love to, work in central London live in a nice place but commute an hour plus. Dealing with international clients all day, to be honest I’d love to get a place in Arizona. Love that part of the country. Being from the UK I’d find the place Mike shoots from to cold I’d chose somewhere warm like AZ.

[@heatheruntz5315]

I recently had to sell my shorty 308 galil with an 11.8in barrel. I came upon hard times and it was the least practical of all my guns so it had to go. I still have my 16 308 galil ace though so that is another reason I picked it to sell. The furthest out I shot the shorty 308 was 400 yards. 556 is probably my favorite shorty round but 308 is the most effective imo

[@alexanderp8037]

Check "jaegar micro galil ace"

[@heatheruntz5315]

@@alexanderp8037 hell yeah dude that thing is sweet! When my financial situation is better I am going to get one of those or a mk18

[@hamhocks]

You should do this same video but with other popular calibers like 6.5 grendel, 6.8 SPC, and the 6 ARC.

[@josiahb55]

Nice. Would love to see some old school optics reviews back. Like the primary arms PLxC 1-8 yall have been talking about.

[@sfdclay]

He said in a prior video he won’t be reviewing any primary arms optics because they are channel sponsors

[@Teh_R4v3n]

Wish there was 6.8 spc II, I always heard it was amazing in all lengths

[@sfdclay]

Yeah too bad that round dropped off and failed adoption

[@justinfrost6934]

12” barrel 6.8 spc is a hammer. It gets another 100-150 fps over 6.5 Grendel for equal bullet weights

[@eindride1268]

I really hope Garand Thumb comes around to reviewing the best Ar15 in the S-tier category. Between Noveske, Lmt, Larue, Radian, DD, Kac, HK, and a couple others, it's so hard to get solid unbiased answers as to which company offers the best, and which offer superficial prices for what you get out of them. I'd love to see a test between all 16 inch 5.56 models, and possibly test the popular variants that don't fit that (like the Mk18) just to see which offers the most. Obviously they're all proficient enough, but it'd be cool to find the king of op-tier Ar's

[@joek5352]

16”!? Most people buying Gucci grade rifles are likely mounting a can and don’t want to end up with a 20” + platform.

[@eindride1268]

@joek5352 Well genius, it's a good thing the test is to compare between companies to see who makes the best rifles, and not a test to see what everyone is wanting specifically. I don't give a fuck what people are using it for, the point of comparitive tests is to compare positives and negatives, and if you don't use the same dependent factors (barrel length) to test with, you're gonna get inconsistent results. I did mention to add popular variants that don't fit that bill, but that's because they're highly regarded

[@zombieslayer7759]

Of all the highest tier AR-15's, the rifles from Blackout Defense are probably the best of them all to be honest and they aren't even the most expensive of the highest tier rifles (they're a little over 2 grand).

[@eindride1268]

@zombieslayer7759 First time I've heard of them compared with S tier rifles, so ima doubt that

[@joek5352]

@@eindride1268 Everyone watch out. This guy knows everything. And will sarcastically call you a genius if he doesn’t agree with you.

[@Sassquootchen]

Gotta love that GT videos are always ready to go right when church is done.

[@TheDankCat127]

Amen 🙏

[@txhookey5608]

Winter usually means bumping up calibers, especially with shorter barrels. Would be interesting to see the same ballistic gel performance through several layers of cold weather gear.

[@walthermodel01]

Great fukcin idea

[@hunterfishman7119]

MEME: WHEN THE PEOPLE IN THE COMMENT SECTION ARE SMARTER THAN THE GUN TUBER THAT IS ONLY INTERESTED IN LIKES, VIEWS & SUBS!!! NICELY DONE GOOD SIR! IF ONLY WE HAD FULL ACCESS TO THE EQUIPMENT HE HAS, WE WOULD PUT THESE IGNANT FOOLS TO SHAME WITH OUR ACTUALLY ACCURATE INFO & TESTING!

[@teampyle9835]

With rifle cartridges the clothing makes almost no difference. There's lots of videos that show ballistics gel with clothing and there isn't any noticeable loss in performance.

[@PD-we8vf]

That channel is tan by Paul Harrell.

[@teampyle9835]

@@PD-we8vf yes thank you

[@ed1968man]

I just picked up the Primary Arms SLx 1X Gemini for my PCC. VERY HAPPY!!!

[@mhicaoidh1]

I'd suspect the optic mount on that 7.62x39. I've shot a lot of Russian x39 and never experienced shot deviation like that at 300 yards.

[@GarandThumb]

same - that was our thought as well. Super bizzare

[@mhicaoidh1]

@@GarandThumb Just remembered another thing ... there's an outside chance it's the booster on the muzzle too. Had one years ago throwing shots low left and low right. But, that was consistent and somewhat predictable. Took it off ... straight as an arrow.

[@atlanticancameos5131]

17:25 Pretty sure I ran with more than 7 rounds back in Afghan. Love the videos mate.

[@GarandThumb]

hahaa meant to say mags

[@atlanticancameos5131]

@@GarandThumb😂 All love man, keep up the good work

[@pulldeauxduck2480]

Thanks for squirting all over the place , 🦆

[@AlreadyDeadInside83079]

Great video! I've been wanting to see an SBR comparison and effectiveness video for awhile. 🍺 🍺

[@SmallHandsBigBite]

Got to say that this was a really well sorted video. All it was missing was a meat target with a high-tech Fa-Leece bullet stop (Love ya, Paul). I grew up almost exclusively with AK's and practical AK kit and manual of arms my whole life until just 2 or so short years ago when I transitioned into, of all things, an FAL (L1A1). The Manual of arms felt very familiar to me with little adjustments needed. Personally, I love to see how you showcased the real world advantages of these 7.62x39/51 rounds. Though I also want to state that I never once felt burdened carrying my AK kit or my FAL kit. I'm curious what magazines you used to weigh out the AKM kit - Steel, Circle 10 Bulgarians, Magpul Gen 3's? I have tried, but wouldn't consciously trade those two rifles for anything else in the world. Doesn't mean I don't practice and get familiar with other systems though.

[@TheDkb427]

I'm the complete opposite lol I have not will not get a commie gun lol. Merica!! Seriously don't want another caliber to deal with.

[@7.62-ATA]

​@@TheDkb427you do know there's a lot of aks chambered in 556 they're pretty much the same as an AK in 5x45 but train with what you're comfortable with just wanted to let you know

[@evans9748]

Idk, still using the 300blk subs during the 300 yard shots kinda defeats the whole point of 300blk, it would have been more realistic to have switched mags to supers, which is exactly how it was designed to be used.

[@GarandThumb]

this is fair - hindsight is def 20/20 after we make videos

[@jayjohnson3732]

I would add that using a 10” blackout would have been better. With that Barrel length the supers are as fast as 7.62x39, carry much more energy than 5.56 at 300 meters, and would be even quieter with subsonic ammo than the Rattler. Don’t get me wrong, I LOVE the Rattler, but it’s not the most versatile blackout platform.

[@GarandThumb]

we went off of heavily used mil rifles

[@evans9748]

@@GarandThumb exactly. no one is running around with a 10” barrel, plus the Rattler still uses the 1/5 twist you won’t get on a 10” anyways.

[@frosty3693]

I am guessing the rifle is setup for subsonic and going to supers would require a gas ssytem and sight zero change. Would have liked to seen it too.

[@rhandley1000]

I highly recommend the FAL OSW. Awesome rifle

[@curtrobinsongarage5452]

Keep up the great content. Your one of my favorite channels. Thanks for the pewtainment.

[@GarandThumb]

I appreciate that!

[@rustyshackelford3781]

Love the comparisons and the different tests. I do tend to run cheaper ammo for training except for my Mk18, I only run issued amo which for training is the Hornady sbr 75gr bthp, or hornady 75gr tap.

[@TheWarriorsMind]

I like the 6.8 spc for my short barrel. It was built for it. But, for pure power, I like my 450 bushmaster for subsonic hunting. Over 800 fpe out to 135 yds.

[@IceGoon]

23:28 got a baby girl inbound 2 weeks. Even if you’re not ready for it, fellas… it’s worth every waking moment.

[@17rpmnate]

For me the 300 blackout makes sense for your primary sbr setup because of the ability to transition from a quiet sub sonic round to a supersonic vmax flesh disintegrating round with a simple mag change.

[@jimwilliams7937]

Flesh disintegrating? Never seen that with whitetail deer

[@ratsniperslugs]

I love my Maxim PDX SBR in 5.56 - getting 1960 fps with M855. I’m running a CGS Helios QD with the vented muzzle cap and it’s not gassey at all. I love my shorties!!! It is pushing 530 ft lbs at the muzzle and 400 ft lbs @ 75 yards (same as a 40 S&W at the muzzle) so for 100 yards and in it’s perfect. The M855 @ 1960 fps MV is still traveling 1044 fps @ 500 yards which will still penetrate level 3A soft armor. A short AR is very useful in the correct application.

[@bretc1012]

I wish you would have switched to supers with the .300 blackout. I thought that was the point of owning one, how you can switch between the two depending on your need. Edit: I guess unless your barrel length and suppressor doesn't work well with supers.. I can see that.

[@61fordf2504x4]

Yea would have been cool, that is a tiny barrel though. I have a 10" on mine but i havent done a good side by side with my 12" 556.

[@leftyeh6495]

The SIG is a piston gun, so he would need another SIG upper, and they're a pain to source. Assuming he's using the rattler with the recoil spring on the piston, so there's no buffer or spring in the lower. I love the couple of SIGs I have, but I feel like I have an emotionally abusive spouse when I have to deal with them. The complete lack of support once the gun leaves the factory is astonishing. And then they come out with a new generation and completely drop parts support for the last one so anything goes wrong and you have a paper weight.

[@gatormcklusky5850]

I'm waiting for Geissele's new addition to the field, their currently working on two new rifles in 6 mm ARC.

[@kalanipitmon7817]

Oouuu i like.

[@LRRPFco52]

KAC made a 6mm Grendel as well. Just wish they would do 6.5 Grendel.

[@lemon8513]

Thank you sir for bring the FAL to the test and to mention South America, we do love your content!

[@lemon8513]

🇧🇷

[@josholdham1033]

Cool video, but I would love to see a comparison video like this just for 300 BO. Different barrel lengths, subs and supers etc.

[@95dodgev10]

A couple vidoes ago he did compare sub vs supersonic through a suppressor and the travel time of the round at longer ranges. At long range when they filmed from basically over the shoulder you could actually see the subsonic flying through the air.

[@Robespierres_Ghost]

300 blackout then 762x39. They are much less sensitive to barrel loss compared to 556 and 545.

[@Mike_858]

Hardly matters when you are using 69 and 77 grain BTHP, those fragment and expand at velocities as low as 1800 fp/s making 10'' .223 AR's very useful.

[@АлакПатрова]

Paying 3x for .300 over 7.62 sounds fun.

[@Ntmoffi]

I'll take cheap 30 cal over everything else.

[@johnmarkfeiger-no5ri]

Personally for short barrels I'd go with 7.62x39. It packs quite a lot of energy and is a more ubiquitous round than 300 blk

[@hexdontae]

@@Mike_858holy shit cope harder 🤣

[@albertoriviera8616]

You guys do great work. Some of us do understand how much work and money goes into such top knotch content. Thanks Dudes

[@alexc414]

I will admit, when it said "AD in 3, 2, 1" I was waiting for an accidental discharge...

[@GarandThumb]

LMAOOO

[@gagedellin6634]

Great video Garand, love the focus on combat performance and aspects instead of straight up ballistics and accuracy. Would love to hear opinion on the 6mm ARC, especially in a 14.5 inch barrel or shorter. There are videos of people shooting a 14.5 inch 6mm arc over a 1,000 yds, just not with a combat focus. I wanna know what someone with a military background thinks of the round and its capabilities. Keep up the great work man. God Bless!!

[@rgochina]

Amazing video! And in the end, all things resume to 5.56 and good old .308. Nothing more is really necessary.

[@SumYungGuy-q1k]

10.5 inch with 5.56 is accurate and comfortable, and designed for urban warfare 👍

[@InvestWithFFI]

In my humble opinion, the exact same weapon in 300BO would be better in 8/10 scenarios.

[@gullahgeechee2699]

@@InvestWithFFIeven shorter 300 still beats 5.56 far as energy.I own both so I know that the 5.56 will tumble out of a 10.5 doing more damage internally.

[@garrettboone4306]

I can pretty confidently tell you the accuracy issue with the x39 is your MRO. I had 3 different ones (broke one). The parallax is unbelievably bad

[@GuacIsExtra99]

Well rhat saves me some money I was wanting to drop on one lol

[@Aonghuis]

Hé is getting a good consistent cheek weld, I doubt any parallax crept in as his pupil is properly in line with the dot.

[@garrettboone4306]

@@GuacIsExtra99 supposedly the HD fixed the parallax. However, I had such a bad experience I had no interest in ever trying it. Also horrific with NV

[@garrettboone4306]

@@Aonghuis just my mileage. I tried using it at a carbine class where we printed groups at 50yd increments from 50yds out to 400yds just to get data on the rifle. I’m not the best shooter by far, but I can hold my own. I was obviously trying my best, but was meeting unusable results. The instructor (veilsolutions) reminded me that a local swat team had such the same experience that they dumped all of theirs. I bought aimpoint right after and never had a like experience ever again. The MRO was the only variable I changed. Again, just my experience, but I’ve heard it echoed plenty

[@Aonghuis]

@@garrettboone4306 , I hear you. My XP with the MRO is limited to one. I only got to take it out to 200, but mine seemed alright. That being said a lot of folks have noticed parallax with the older versions of those. Try the compM4, or the Aimpoint PRO.

[@neglectfulsausage7689]

short .308s should have a large expansion chamber like ak74m's muzzle devices, that goes back to a small opening. The expansion chamber is there to burn the rest of the powder quickly and create more boost for the round. The small opening should be about 2-3 inches long, and have a sloped entry point so the bullet can create a seal again and get the boost from the powder. Essentially turning it into a "double fire" gun. The round goes off once in chamber, then there's another deflagration in the expansion chamber to give it a nudge for optimization.

[@intellectualiconoclasm3264]

My bedside AR is a 11.5" 5.45. Little recoil, it runs straight back, and almost the same POA/POI at 25m and 300m. That covers the home and half the neighborhood.

[@racc7931]

5.45 ar?

[@gifthorse3675]

Just so you know that AR will land you in deep water if you use it because it’s NFA.

[@intellectualiconoclasm3264]

@@racc7931 Yup. I built mine, but they can be found. Modle1Sales in Texas stocks a reasonable variety of 5.45 and 7.62x39 barrels or complete uppers. Their barrels are hard-coat chrome lined from the chamber to muzzle. Match that with a hard chrome bolt, and 7N6 is no issue. I literally just wash out the salts. RedX Armory sells bolt-faces and Comm-Block optimized firing pins. For mags you just cut the front anti-rock tab short on a P-mag. They only run 28 rounds, but they're easy to grab.

[@intellectualiconoclasm3264]

@@gifthorse3675 How so?

[@lohikarhu734]

Do you live in Africa? A "bedside AR" sounds like you are living in a damned war zone...

[@zachvanetten]

Great video guys! I have th8nking about this topic a lot lately, and I was actually considering a 6arc in a 12.5. Problem is, I have 0 experience with that round. Wonder how it would have held up against these.

[@gatormcklusky5850]

same, I'm looking forward to getting a 6mm arc.

[@isher__]

A friend of mine has one. He says it's fantastically accurate, but dirty as hell suppressed.

[@gatormcklusky5850]

Geissele is currently working to release two versions of the 6mm arc, One an 18" recce the other a 20 version, I'm gonna pick up the 18 positively.

[@investigativeoutcomes9343]

barrel burner. lol

[@LRRPFco52]

10.5"-12" 6.5 Grendel is unbelievably-capable. 10.5" Grendel has almost 2x the supersonic reach of a full-length 16.3" AK, shooting the exact same bullet weight. I've been shooting AR-15s since 1987, starting with the Colt AR-15A2 Sporter II, then practically every variant since. I enjoy 12" Grendel suppressed more than any other. It hits steel hard, while having low recoil. Penetrates deep as well, with a ton of different projectile weights and over 100 factory loads.

[@HeisenbergFam]

11:52 editor deserves a raise for that well made scene

[@SwissTankGrunt]

Very nice video. I was expecting the 308 will bust the other SBR's, only downside as here showed the heavy weight. For me is the 308 Battlerifle the way to go, as it is also not such a big deal to carry 10 Mags, you just need to be fit and do a smart loadout. 😎

[@GarandThumb]

hahah being fit always helps

[@lolinskimk6]

Or carry like 20 mags of 5.56 and not run out of ammo

[@jupiterjunk]

3:35 - Best response for ALL firearms.

[@kotatactical2936]

I really want to see you run the POF revolution piston driven 12.5in 308! I'd love to see how it holds up to your abuse!

[@Featherless1]

I think it'd be the other way around... You'd see how he holds up to its abuse. 😂

[@financialwellnesswithantho6651]

I second this. Would love to see some POF rifles in general on here

[@kotatactical2936]

I would gladly send him mine!

[@Featherless1]

I really want to see him test his skills with corn syrup on his hands...

[@CatmanBBQ]

"You're probably not going to want to shoot very skinny people with this." Best line ever.

[@cristianpatino2211]

Love ur channel man, please never stop and live forever, thank u

[@adolfosalasiii1306]

I’d love to see a video on the 6.8 SPC. It’s too bad it’s not more popular in military circles.

[@holezzz15]

6.8 was just a solution lookin for a problem. Beyond 400 yards, you're better off with 5.56. Ammo choices aren't as plentiful as 300 bo or 5.56, and it requires many proprietary parts. It's a great round for within 400 yards, but 300 bo is right there with it and uses many of the same components as a standard 5.56. I do like the 6.8, but balistically speaking, it's really just a more expensive 7.62x39

[@K-bob_45]

@@holezzz15 I wish instead of 6 arc we had gotten 6 Valkyrie. So slightly shortened 6.8 spc case necked down and have a ~70 gr load for close and a 85-90 gr load for distance. 6.8 spc is kind of a flop but good mags already exist and the 6.8 bolt head is better off than the grendel bolt head

[@joshualund4876]

6.8 is a great round but 556 is flatter shooting than 6.8 out of a 20 in barrel compared to a 16 of the 6.8 on the Hornady black loading. 300 blk doesn’t hold a candle to the 6.8 ballistics but ammo availability really hurts the 6.8 and and parts compatibility is really a non issue.

[@JD-tn5lz]

​​@@holezzz15not at all. 6.8 is popular where I live because it has superior knockdown power to a 5.56 and easier to carry around than a .308. 7.62x39 as a hunting round? There are very few folks that do that up here. Yes, there are folks up here who use them for caribou, and with the packages available, I haven't met one other hunter using an AK pattern rifle for actual hunting. When we have to take that 300yd shot, we're alot more confident with an AR in 6.8 than anything in 7.62ak. I've put 6.8 through 3/8" mild steel at 100yds like it was nothing. 5.56 and 7.62 barely dent it.

[@JD-tn5lz]

​@@holezzz15also, the 6.8 was developed to address an existing problem. In Iraq it became an issue when troops consistently complained about making hits but not making stops. War isn't COD. Very few hits are made by individual troops at individual targets past 300.

[@TEstevao]

“This rifle is very well gassed” immediately after stovepiping lol

[@JohnJones-op8uf]

Thanks for the vids. Mike!

[@High_Desert_Tanner]

Awesome info! Now do it again with better optimized ammo lol... soft point 5.56, 300 supersonic, 7.62x39 sp or hp, and some 308 varmint ammo... you'll get wildly different results

[@crawdadandtheboilers]

The whole idea of a .300 BLK SBR is for use with a can, and you get better sound suppression with subsonic. If you are going to shoot supersonic, you might as well use 5.56mm, since that gives you better range. As for AR ammo, I suggest 55 grain FMJ over 72. The heavier load has a hard core inside, which does better at penetrating hard targets, like a car door, but the core often isn't centered well, which can throw off your aim at farther distances, and a the lack of a core in the 55 grain means it will expand better in soft targets.

[@leftyeh6495]

​@@crawdadandtheboilersyou have zero idea how bullets are made 😂 All fmj bullets are a copper jacket that's formed in a stamping die and filled with lead. Some are filled from the back and the lead is visible, some are filled from the front and the jacket is then swaged shut and formed. Only way to get away from a lead core is using a monolithic copper solid bullet. If you're seeing erratic groups with heavier bullets you either don't have enough twist to stabilize, or the barrel just doesn't like the load. Not all loads are the same per bullet weight. Also, copper solids need more twist rate to stabilize, as they have more length for their weight.

[@leftyeh6495]

​@@crawdadandtheboilersalso, your ideas on bullet construction are all wrong. Fmj tends to tumble and fracture going through hard barriers. They never open up to their core unless fractured. Hollow points or soft tips will mushroom and open up. This includes all plastic tipped hunting bullets that are just a hollow point with a plastic filler for aerodynamics. The only things that will penetrarte armor are armor penetrating rounds. They will have a hardened steel piece imbedded in the lead core, that will generally go into the armor as the lead and copper get peeled off. It's wild, a 50bmg AP round will only leave a hole maybe as big as a 30cal as the majority of the bullet is stopped by the armor and only the steel ends up punching a hole.

[@leftyeh6495]

Most of these cartridges do way, way better out of an 18" barrel. The blackout with subs was designed around a 9-10" barrel, so it's the only caliber and load that even makes a ton of sense in an sbr. The other factor, is the bigger stuff like 308 out of a 10" barrel is extremely hard on the suppressors. Many aren't even rated for 308 under 16" because of the peak muzzle pressure on short barrels.

[@josholdham1033]

@@crawdadandtheboilers No … to almost everything you said. But props for spitting it out with such confidence

[@mastadlo]

Let's get a 6.5 grendel video. Think it's an under-appreciated round.

[@byronc.9861]

Agreed. Ive taken a 12.5 out to 400 on 2moa plates. If youre not running subs, it's the ideal ar 15 caliber for sbrs (discounting the price per round).

[@alanw1775]

Agreed. 6.5 grendel would smoke any of those one way or another. "Start slow and end fast" as bill alexander said.

[@officecomputer8887]

6.5 grendel is obviously the best sbr caliber

[@officecomputer8887]

an sbr wont really benefit from the extra muzzle velocity but will benefit from the heavier round @@ryoannazuk949

[@gzuzsavz]

A fabulous video, thnx guys! These are all good rds. I don't have a short rifle..unless ya count 16" as short..a 9mm PCC Ruger w/Glock mags & a Saiga (hi cap latch) in 7.62x39. Izhmash💪 I think..why lop 4" or 5" off of a bbl to lose energy & velocity & gain noise? 🤷‍♂OK..CQB, yes. That's where a short gun shines. I'm in a rural area & on SHTF day..I ain't going to town, lolol.

[@brianleverich4467]

I’m thinking going with a 12.5 .308 win. Pistol because it’s legal in our shotgun slug zone but waiting for this brace bs to get sorted out. Maybe a .358 win.

[@gatormcklusky5850]

Lol, I have a 13.7 .308 it's a bad dude!!

[@SFGiantsfan9797]

Do 13.5 from LMT if you want short

[@gifthorse3675]

I like short .308’s but man they’re so loud

[@coltzee1]

13.7 pin welded here, love it, be sure to get an adjustable gas block.... I'm slinging brass 20 feet in front of me

[@marzcapone9939]

I've got an LMT MWS with a 13.5" .308 lightweight barrel. It's got a Smith Vortex flash hider pinned and welded, so it's just over 16". The Speer Gold Dot 150 grain turn water jugs into vapor, rip them in two at 120 yards. Never seen any muzzle flash with the Speer or any 7.62 NATO rounds either, at least from shooter's perspective.

[@Paul_Howe0216]

I would love to see the 8.6 in this mix up. Just curious how it would fare.

[@sfdclay]

It would be interesting, but it is still so new

[@johnmenezes2031]

And conversely the 6.8 spc

[@CarnivoreDog]

These are the types of comparisons I enjoy the most.

[@Girth_Brooks01]

A video on the only Short Kings people like.

[@megacandid8789]

I predict that .300 black out, 6.8 spc/ 6.5 grendel, and 7.62x39 are gonna be the trio to pick from

[@LRRPFco52]

12" 6.5 Grendel has about twice the supersonic reach as 16.3" 7.62x39 shooting the exact same bullet weight. Short barrel 6.8 SPC will go subsonic at around 600yds.

[@boygonewhoopdataZZ]

Those specialty rounds go through barrels like crazy and I don't even shoot poor man's steel

[@Clockwork0nions]

Not if you want to shoot anything beyond your first engagement lol.

[@chicorodriguez3964]

You said trio but listed 4

[@LRRPFco52]

@@boygonewhoopdataZZ 6.5 Grendel has better barrel life than .308 or 5.56 due to much lower chamber pressure (50-52ksi vs 58-62ksi). Brass life is also higher as a result.

[@stevenwilkinson8373]

For me, 300blk subs 220g at 900 fps (yes I know it is comparable to 45acp, but dammit it's a rifle round) in an 8.5 barrel suppressed is the ultimate home defence tool. With the option of switching to 110g and/or 130g at 1950fps (chrono tested and properly set up so no adjustable gas block is needed) with less than 4" impact shift at 100 yards I believe 300blk is almost a do all round for an SBR Emphasis on Home Defence. My load out will always be 5.56 16" barrel suppressed.

[@luckyomen]

6.5 Grendel is surprisingly great out of 12 inches.

[@weinerdog137]

Not surprised

[@jessesimmons4503]

6.5mm Grendel is what i would choose. especially in a Draco.

[@luckyomen]

It's limit in a short barrel is very much 12inches. anything shorter is too slow for the properties of the bullet design to be effective. otherwise, it performs really well out to 350 yds@@jessesimmons4503

[@adamg574]

6.5 grendel is heavily slept on. Love that round.

[@crusiethmaximuss]

Could you add the sound effects of defeated players from old school Street Fighter games when a projectile hits ballistic gell really long question?

[@GarandThumb]

sure

[@crusiethmaximuss]

@@GarandThumb 😎🤝😎

[@xowhiplock]

My AR15 pistol has a pistol lower, and a 10.5" upper, that when measured front to back without barrel device, is under 26" (i.e. 25.5"). It's chambered in 7.62x39. I loved how you clowned around and made it look inferior to everything else. Its purpose is 200 yards or less accuracy without over penetration. PPU SP RN 123 gr Rifle Line ammunition. It can reach out to 300 yards if zeroed properly, and correction applied for drop. Beat the 5.56 hands down IMHO for price performance.

[@jazon9]

6.8 SPC is very nice for SBR

[@unashamedly1776]

Great video. I do wish you had included a supersonic 300BLK round (such as a 110gr) as it’s big selling point is the ability to switch between the two.

[@coreymoyers5771]

6.8x51mm was designed with higher pressure cases for faster-burning powders that work well in shorter barrels. 6 ARC does well from a shorter barrel due to the short, stubby case.

[@johngalt1040]

Based on this info, your best bet would be to carry 308 rounds loaded in a 5.45 case using 5.56 magazines unless your going suppressed. Then you may want to use the 7.62x39 since it makes zero noise due to it not firing. Shooting into cover, looks like the grenade launcher may be the ticket. I wish he would have talked more about the coriolis effect in South America shooting a FAL 308 north to south.

[@stever8776]

As the rotational velocity varies with your latitude the Coriolis. The Earth's rotational velocity is greatest at the equator As you go farther North of the equator the rotational velocity decreased. The same thing happens as you go south of the equator. So a bullets path would be appear to vere slightly to your left. In the North Hemisphere the bullets path would appear to be shifted to the Right. But the distances a rifle bullet travels makes the shift not a problem. If you are shooting up hill or downhill you need to account for bullet's drop. Without a chalk board it's hard for me to explain. Get a ballistics program for your phone, a rangefinder, a good scope and a good spotter.

[@DevDog67]

What?

[@Jacobpenner.]

Do a full auto m14 video and see how controllable it is!!

[@gifthorse3675]

It’s not I’ve shot a full auto M14 EBR and after the 2nd round you aren’t hitting anything.

[@Jacobpenner.]

@@gifthorse3675 the rounds per minute are far too high to be controllable for most people.