300 BLK - 125gr Speer TNT

Today we have a look at the 125gr Speer TNT in 300 AAC Blackout. The test powders are VihtaVuori N110 and Hodgdon Lil' Gun.
UPDATED 09/27/2018 - All links have been removed to comply with KZbin content policies.
www.patreon.com/reloading

[@BoltActionReloading]

I am interested to see the primer tests as well. I have done my 6.5 creedmoor tests on large rifle primers and H4350 and just finished loading the same load for small rifle primers in Lapua brass. I wouldn't count the S&B out as my testing the velociyy was low but the SD was still very respectful. I found that the magniums performed better as well though. kzbin.info/www/bejne/r6GsZ3djnppqq80

[@JohnnysReloadingBench]

The more I think about it the more I think I'll just test them all. I got some Winchesters but the Remington 7 1/2 was out of stock. I might try one more place but I am ready to get started and don't want to wait. I remember seeing your vid when it was posted...hopefully others will go check it out. Good info.

[@uralbob1]

Wow Johnny, Those graphs are very informative and valuable! Sincere thanks to you for all your diligent work. You are a gift to the reloading community!

[@TimKollat]

These are some of my favorite bullets for the 308. I don't have a 300 BLK but for the 308 these rock. I really like them in the 223 also

[@kraigkearns1527]

I worked up a lil gun 300 boload with the 125 tnt. 17 grains gave exceptional accuracy Sub moa. Winchester primer getting 2214 average. I have a ruger American 16 inch bolt action.

[@robkilcollins310]

TNT has very explosive expansion... hope you get a chance to pop a critter with them. Great video Johnny! My reloading crack lol

[@richardmcdonald4190]

It will kill hogs at 300 Blk velocity, for a pistol length barrel.

[@SleeplessInFl]

I have always found that a heavier crimp works better than using the ball powders in 300 Blackout. I have switched to using Magnum primers in a heavy crimp

[@garryoldham8779]

Thank you thank you thank you for doing a video on these bullets, I have 3 boxes of these just sitting around for the past year and have been meaning to test them but never got around to it. While I know no two guns shoot alike you gave me some great starting points.

[@gordonkaylor8793]

Johnny, spherical powders often work better with magnum primers. If you redo this experiment and use magnum primers you’ll get more consistent ignition and velocities.

[@JayJay3Fifty7]

Sometimes the bullet does not like the barrel/gun. I've done same rifle, same primer, same case, same powder, different bullet and I turned ugly groups into pretty sub MOA groups. Reloading and I are in a love hate relationship. I just can't quit her. 257 Roberts with 90gr "yote slaying" Sierra BlitzKings is my latest project. Like your videos Johnny.

[@hartfloorcovering]

Oh yes...the primer decision! A bit overwhelming... I have cci400/cci41 and rem7 1/2 in addition to I think 5 different powders. From what I have gathered from past shoot sessions- CCI 400 are out. The #41's do well but have to say what batches I've run with 7 1/2's seemed to perform very well. They are hard to come by so my go to primer for BLK will probably stay with the #41's. I know a dealer that has really pushed CCI BR4 but haven't tried yet. I feel ya with all the variables...damn!...

[@CCXRS7]

I absoluetly love the Speer TNT. Inexpensive, accurate, and very effective on game. I load 18.7 grains of H110 for my 10.5 inch barrel and get just about 2300 fps.

[@echofoxtrotwhiskey1595]

That’s pretty hot. What primers and brass do you use?

[@CCXRS7]

@@echofoxtrotwhiskey1595 Historically I used CCI 400's, the past few years it was whatever primers I could get my hands on. Brass was usually Starline or Fiocchi (range I used to work for sold a ton of Fiocchi ammo so it was free for pickup), or I would convert Lake City 5.56, but you need to back off a few tenths on the powder charge if you're running converted 5.56.

[@CCXRS7]

​@@echofoxtrotwhiskey1595it appears KZbin is going to keep deleting my answer

[@Subtlenimbus]

@@echofoxtrotwhiskey1595hot is an understatement. In a 10.5 inch barrel, 2100 fps is way over SAAMI. 2300 seems absurd.

[@ericstegall9278]

Everyone has some small piece of advice for you on these comments. My only 300 blackout barrel from BA is 14.5 inches, and crazy accurate. My 10.3in 300 blackout is a faxon, and is so so. I only obtain moa using 110gr Vmax with a rear bag to steady that short of a rifle. Don't give up brother.

[@calangel]

Yep, love lil'gun in the hornet. It does have wild SDs at times, but it is also very sensitive to the type of primer you use. It is very temperamental until you pass the first velocity peak and get to compression. The behavior of LG is different based on whether it is a bit loose or compressed. Hot primers when loose, cooler primers when compressed. Another issue you will have with LG in the 300BLK is that the deterent layer is VERY slow. Quick Load will not properly model LG burn rate due to this. You need a longer barrel as burn rate speeds up more than other sphericals once it passes the deterent layer. That's why all of the sphericlas had bad SDs: the barrel is too short, methinks.

[@sanjacintooutdoors8588]

Not sure if you are still reading comments on this one but i have had outstanding results with 300 blk using shootersworld socom powder in both subs and supersonic ammunition. you might wanna give it a look. my 16 inch anderson carbine gas home build upper zeroed at 100 hits dead center of the 30 inch gong at 300 yards if you put your dot at the top of the gong. so ~15 inches of fall between 100 and 300. bullet is hornady 147 grain fmjbt. I plan on testing the tnt soon.

[@billscott1277]

Johnny, great videos and appreciate the work. Wish I'd seen this one before I loaded 125 gr. TNTs over 19.7 gr. of Lil Gun and WSRs... 1500 of them . (Hodgdon states 17.8 gr. min. -21 gr. max.) so I though I was in about the middle. Trying them out 1-26-18 thru a diamondback 16"/pistol gas. If I don't blow my face off; I'll report back in the comments. Looks like 450s under n110 would have been much better. Using a Lee Turret and Pro Disc for powder and noticed when I have to jam in a primer or bullet it increases the powder load by up to 1.2 Gr. Decreased this variance by closing the Hopper valve to 1/2 open. (less vibration settlement.) Will be shooting over a Chrono at 100 yds. Thanks

[@joesill]

I've loaded alot of different weights of 300AAC and have concluded that all of the powders need Mag Primers to get good accuracy.

[@monitor1862]

HCNFAN I think I'll give the Mag Primers a try.

[@pogeegitz]

My Blackout loves these bullets with H110. Accurate, consistent and cheap.

[@highlineprecision2052]

I think the Lil gun powder would have done better with CCI 41. I bet it left unburned powder on the groups of large extreme spread

[@shoofly9403]

Thanks for the great info on 300 Blackout!

[@556suppressor]

These bullets are out of stock everywhere (12/2018). Outstanding accuracy tests !

[@wbpursell]

I recommend that you try a "V" shaped shooting bag instead of a bipod. Also use a rear bag. The longer the bag, the less wiggle. I didn't think it made that much difference until a guy at the range showed me the difference. It seemed to remove about 0.1 mil of random left-right movement.

[@rogervanvarick3499]

Reloading 300 blk out with 220 berrys bullet and 12grains of CFE blk. Factory cartridges measuring 2.09, the book says 2.2. Love the way it cycles at 2.09. Any comments,or something I should chage? Your videos are very informative, Thanks

[@bdubs1010]

Maybe worth picking up a receiver lapping tool to square the face where the barrel meets it. That may explain your POA shift.

[@joshuasmidt8595]

would love to see more on these tnts I think I got 500 of them for 17 cents a round. Ive got 8 pounds of h110 to work with cant wait for my new scope to really dial in my loads.

[@thatguyoverthere2288]

If you have H110 try that with the speer 125s. My load is moa and hits steel past 300 yards in sbr. Makes jaws drop at the local matches.

[@secerator]

What COAL? Seems that he is using 2.1" which seems a little long for this bullet. I use Hornady V-Max, z-max and SSTs and those are 2.05-2.1" COAL, but those have a plastic tip which makes the bullet longer. So logically for these ones the COAL should be shorter than those for the same amount of seating depth.

[@thebaddest2562]

Win small rifle are my primer of choice and rem mag primers in lg rifle. Sapping uppers is a good idea that was alot of shift with the scope and its ok if ya spend a lil on hookers and coke

[@stuckcase7775]

These bullets perform in multiple cartridges in gas guns and bolt guns for me. Excellent bullet

[@doncraig3665]

did you hand weigh each powder load before putting it into the case? i'm working up deer load for ruger ranch 300 bo and 125 tnt's. thanks for your input!

[@ronstillwell3942]

try fed 205 match primers and try a heaver bullets and different powders , i've had good luck with the fed 205 primers and your rifle may not like that bullet

[@PyroRob69]

These TNT's have been my standard bullet for about everything.

[@travissmith2211]

I use these as my range rounds sitting on a charge of CFE Black. Using converted brass from friends and range I'm keeping it rather economical.

[@dgunnut6550]

I like your videos so much I even watch the ones for calibers I don't own. And now that you are human and make mistakes, like shooting at the wrong dot, I'm even a bigger fan. 😂😂😂. Keep up the good work!

[@tjh44961]

From everything I've read in the past several years, the Federal Magnum primers seem to be "hottest". In densely packed loads in .308, I've used the Federal LR Magnum, and in black powder loads, I use the Federal LR and LP Magnum primers, on the advice of Mike Venturino, who did a thorough analysis of primers for use in black powder cartridges. I'd be interested to see the effect of shooting the exact same N110 loads through the 16" barrel, just for grins. Also, with the Lil' Gun velocities all over the place, like the weird ones from yesterday, the magnum primers might also settle those velocities down. Not all "ball" or "spherical" powders are hard to ignite -- think W748. In the short barrel, at supersonic velocities, conventional wisdom would have us think that the faster burning powders would give the best performance, allowing the majority of the powder to burn in the barrel, and create velocity, rather than burning in the can, where the pressure is wasted.

[@jgbi74]

You should try the Nosler 125 gr ballistic tip bullets

[@richardmcdonald4190]

Speer 125 TNT's are my go-to for 300 Blk. I was sorry you didn't do a Vid using 296/H110, or did I miss it? In any case, they shoot well in my Rosco 10.5, with H110. Enjoyed your Vid using CFE-BLK, as I use it for everything 300 Blk 150 grain and over. Great with 208 Hornady's Sub-sonics.

[@nhanquach4388]

If your 16" upper is entirely from BCM, they actually make their barrel extension a bit tighter than other upper receivers.

[@rogerpemberton79]

I'll preface this with I have never loaded 300 blackout. I imagine it would be like loading most any other cartridge though. Having said that I would start with my best powder and test all the primers you stated except the Remington's. Call me crazy but the performance I have gotten from Remington primers in the past has been less than mediocre at best. I'm also wondering if weight sorting the new lot of brass might help with the strange flyers you get. There's been quite a few where four shot groups looked pretty good but a flyer turned the group to horrible. Just something to try maybe if you think it would be worth it.

[@camnusg6137]

I wonder if you should try under charging lil gun and see how it shoots. Another great vid.

[@paulx2777]

Didn't the Speer manual used to say you need a magnum primer for spherical powder?

[@pazdunemaul]

Thank you for your hard work on these videos! Very inspiring and interesting. I wonder if you have tried Vihtavouri Tin Star (N32C) for subsonic load? Would be very interesting to see you test it with different bullets, including the Hornady SUB-X!

[@WestDesertShooter]

I've seen pictures on Instagram of people blowing up handguards running a barrel shorter than the rail, I wouldn't do it unless you only run the van and the suppressor sticks out. Can't wait to see primer tests!

[@jasonfife2751]

Love the videos. I'm hooked. Any chance we can see you do a work up with the 77gr Match King? A copy of the military's MK262 perhaps? My guess is that is where IMR8208XBR will shine.

[@Falconguygaming]

Jason Fife I would love to see that too! I am getting into reloading with that as one of my goals!

[@Falconguygaming]

he should get a box of actual mk262 in order to see the velocity he gets in his gun, instead of chasing something that isn't possible in his gun

[@JohnnysReloadingBench]

Once Bobs' bullets get old this will be my next series.

[@wesjwaandrews7524]

You may not like this but could you put a, filmed on date, in the description so it gives us an idea of how long you've been holding out on us lol just kidding I love these daily videos I start school next week (sophomore :( kinda scary) and I'm not really grounded but restricted from reloading or shooting or even looking at guns until I get my permit so I've been studying that and worrying about school starting since you put these videos on at 7 school doesn't start till 8 so I'll be spending time in the locker room watching your videos this month (my first hour teacher is probably going to hate me and you by the end of the month lol) keep up he awesome work and the 9mm videos.!

[@wmh1914]

Do you ever work ...wish i had that much time on my hands for swapping barrels and testing primers lol ....living the dream!

[@emo1net]

Please don't skip the CCI-400 and it would also be great if you did the primer test with more than one powder.... W296 and N110 would be awesome.

[@shotover7719]

Id like to see the #41 primer, the VintaVuori and or CFEBLK powder and the 125gn Sierra TMKs and or the 125gn Nosler BT.

[@davidpeterson6147]

I believe there were previous videos on this channel where 300 BLK was used without magnum primers with poor results as well. 300 BLK is mandatory with mag primers.

[@colsoncustoms8994]

The bullet base to ogive measurement on these 125's would be gold to me if anyone has some laying around and could check real quick. I had really good luck with the 130 grain hp's seated out long in a lr308 and wanted to see if the 125's had a longer or shorter distance to the ogive. A longer distance would allow me to seat them out more and get closer to the lands and / or have more of the bullet in the neck of the case (currently those 130's are only being held by around .200"-.250" the way I have them loaded, can't remember the exact recipe off of the top of my head).

[@MrFixtheworld]

You'll notice the best groups with 2.075 oal. 125gr speer. Just an fyi. Many shooters now use that OAL.

[@georgeleeper2419]

Im planning on building a 300 blackout before long and plan on a 16" gun with pistol gas. I think your just asking a little much of a barrel designed to do its thing inside 50 yards 99 percent of the time. But that being said If your clearing rooms great barrel shooting groups at 100 yards not so much. Can tell your frustrated but keep up the excellent work brother.

[@truebornsonofliberty554]

Actually, the 300blk was never meant to be built with a 16" barrel. In fact, Advanced Armament Corp, who created 300blk from the Whisper design, optimized the cartridge for use with a 9" barrel. Some of the trouble Johnny is having, imo, has a lot to do with his use of standard primers and negligible crimping.

[@davidpeterson6147]

100% correct.

[@nhanquach4388]

George Leeper 99% of the time is kind of a blanket statement. I like my subsonics to reach the whole length of the property to dispatch chicken eating predators at night. So it has reach 100-200 yds while being quiet and accurate.

[@nhanquach4388]

M85FSLUVR a lot of people think all the powder is burned within "9 inches" and any longer would be a waste and companies should stop making 16" barrels. < If I had a dollar for every time someone says that.

[@theelwhastrummer7166]

You think 18.8gr of Lil'Gun for 125gr bullet is hot? Hodgdon data shows up to 21(c), and Hornady manual is max at 20gr. I put 21 gr in a case just to see what it looked like and I laughed...pretty sure I wasn't gonna get a bullet seated with my LC case filled literally to the top with powder. I went with 19gr, and although I didn't have my chronograph with me, there weren't any pressure signs at all, and actually a very nice, zippy load out of my 7.5" AR pistol. Cool flame ball, too!!...LOL

[@tonys9391]

Question! I have a Sig MCX with a 9” barrel and a 1:5 twist rate. I want to use these 125 grain TNT bullets for supersonic loads at around 2100fps, but am worried that they will come apart due to Sigs 1:5 twist rate. Do you think it’s a legitimate concern?

[@jonjames4281]

This is killing me. I really want your 300blk to shoot a great group. seems like it starts to then the last shot........ well i'm rooting for ya....... Lapping the upper is pretty much a must if your looking at accuracy and will keep scopes extremely close to the POI when switching them between guns. The tool/kit is around $30,(ebay) it's easy to do, keeps everything inline for best possible performance. Just got a rest called "the 7 rest" from caldwell. I'm digging it, works great on all sizes of ARs even with 30rd mags. might solve the short barrel bi-pod issue. super lite, $21 on amazon.

[@m96jay]

I think your new brass is softer than the lake city. Explains the marks.

[@rohawaha]

Johnny ! Do you think you might not be burning all the powder when shooting the little gun powder ? after all its only a 10" barrel. The way we would check for this was to lay a couple of feet of construction paper in front of the bench.

[@452Rob]

Considering these are magnum pistol powders designed for revolvers using straight wall cartridges and charges from 10 to 30+ grains in barrels from 3"-7.5" or so, and considering most slow rifle powders are burned within about 2"-3" of barrel, yes, the barrel is long enough to burn all the powder. That is exactly why the 300AAC works so well with short barrels.

[@liljojo4711]

Test it all. Short barrel in long upper, al primers with bobs bullets, check scope. The more u test the more data u have.

[@player2883]

Why don't you ditch the bipod and use a front and rear bag. Caldwell makes a bag set for ar15. I always get better groups with a bag.

[@GusBuster-ti4mc]

I think you should do the same test but by the reloading book Hornady or whatever and starting with the low charge and end with the max. I think you will have better accuracy!

[@jonnygrizzle]

I'll add another vote for 125 grain Sierra Pro Hunters. I'd like to see a video on those.

[@richardmcdonald4190]

The Pro hunter has too thick a jacket to expand at 300 velocities. TNT's are better.

[@robertcoffey4020]

Love the channel and the tests you do, what do you trim you cases too? My 300 blk I use a case that’s cut down LC brass @ 1.358”, I use 15.4 grs H110, CCI 450 magnum primers, and a 147gr flat point bullet, with OAL @ 2.095”. And I’m getting 3/4” groups @ 100 yards.

[@evanhart5537]

Johnny, two things about using the longer hand guard. The KMR would be to small for the Omega to slip inside. And also I think there are some pictures of what happened to a hand guard that someone shot inside of with a brake. I'm not sure how a flash hider would do. www.thefirearmblog.com/blog/2016/06/28/dumb-idea-handguards-past-muzzle-brakes/ I do think it would be a more stable rest though. But you produced some good groups with the Rainier barrel. I also had a Burris P.E.P.R mount, mine would not hold a zero, and shifted zero every time I would remove and reinstall(no matter how tight I made it). Yours seems to be doing well on the 223, so I doubt it is that. I am rooting for you to get a good load worked up. I'm curious if it can be inconsistencies in the brass causing some of those flyers. I have been told in the past, to remove the flyer shot brass. I'll admit I haven't done that yet, but I may some day. Some of yours have been really far off the group. Keep up the good work!

[@wesjwaandrews7524]

Here's an idea could you use h335 in 9mm. It's more of a survival question red parachutes are falling from the sky but I just ran out of tite group but I've got an 8 pound jug of h335 and 1000 9mm bullets laying around (primers included) is it too slow to fill the case enough to poop he bullet out?

[@1Alexville]

A lead sled would be a sure way to mitigate a definitive variable.

[@dotman1334]

Magnum primers? wonder if the standard primer cant get the spherical powder to burn?

[@shanerhodes925]

I've always been told that mag primers with ball powder and standard primers with stick powders. Stick needs more burn time in the case and ball powder is harder to light off and it wants a quick burn. Just what I've always been told

[@truebornsonofliberty554]

Shane Rhodes I've been an advocate for mag primers with everything 300blk. Trying to get full cases of fast burning powder off with standard primers leaves a lot to be desired. I err on the side of a sure thing.

[@shanerhodes925]

Yea I really don't know a lot about the 300 blackout but I was saying as a rule in about any case but makes sense in that little case with a big bullet to get hot ignition

[@PyroRob69]

These are my go-to bullets. LilGun works well, but it is hard to find where I live.

[@longridge3078]

I hope you got Sierra 125gr Pro Hunters in your line up. I Just started loading them over some LIL GUN and preliminary testing shows great promise in my 16" AR Stoner barrel.

[@jonnygrizzle]

I've been having good luck with 125 ProHunters and 18.0 or 17.4 grains of Winchester 296, both of those have been giving the same size groups out of my 10.5" barrel.

[@akrolling3015]

I am looking at 2.128 OAL 20 to 21 grains of CFE with this bullet. How sensitive is this cartridge to OAL ? I found a greater risk to too long an OAL and kicking bullet out. I got great accuracy with this bullet with powder 4227 2.120 OAL 17.6 grains powder CCI 41 primer

[@xnorcal831x]

Hold some of those case up to the light n see how flat those headstamps r now I seen a bunch of them bent

[@brassmonkey0300]

like the channel i have a WOA 22 nosler barrel never fired that wouldnt see more than 25 yards for a while. shame. you wanna do load development on it? not much information out there.

[@overkill0149]

Able you to re-test this using Trail Boss for subsonics? Very curious to see if these things will expand at ~1050fps. In a bolt gun this would be amazingly quiet and if the bullet still performs then it's potentially still very effective on varmints.

[@Mattorrr]

Hey bud I have a question about “crunchiness” when seating a bullet. I noticed it when I was loading H4895 with Barnes TTSX 62g 223. At first I thought it was the copper but I’ve come to realize it’s the powder. How dangerous is compressing loads etc and do you have any videos on it. Thanks! New sub and New reloaded here!

[@OzarkSpirit]

Same test with stick and ball powders. See if there is a difference.

[@mikeingeorgia1]

Have you had a chance to try Shooters World Socom powder? Their load data has some decent velocities with 125s, around 2,100 fps.

[@uelhunter8160]

Im a fan too Johnny .

[@mikutrash5050]

I just discovered you're channel, great content to satisfy my autism 😅

[@sterlingperry9114]

loving this vid a day

[@jdblackwell2]

Your vid spoiled me on VV N110 with the Speer TNT's (17gr @ 2.1" OAL). Lately I can't find N110 anywhere. What would be your next best recommendation be?

[@tylarhaugan7908]

I wanted to load some of these in 300 winmag

[@jferg711]

What about a lead sled to try and tighten the groups up?

[@FFFF-x9i]

That’s for queers

[@slomonebigpimpin8672]

hey I have seen that you use Winchester 296 rifle powder with some of your 300 blackout loads my question is Winchester 296 rifle powder the same as Winchester 296 handgun powder and can the Winchester 296 handgun powder be used to load 300 blackout with the 296 load data your help with this matter would be greatly appreciated thank you

[@charlesmay3673]

There is no Winchester 296 “Rifle” powder. There is only Winchester 296 powder (or H-110, same exact powder). It can be loaded in cartridges appropriate to its burning rate whether they be long gun or handgun, I.e. .357 Magnum, .41 Magnum, .44 Magnum, .300 Blackout, etc. Even the .30 carbine!

[@EvendimataE]

is it possible to make the 300 very hot to make it as powerful as ak round?

[@kaymio6547]

Why don't you switch paths for a bit and make some Grendel videos? Maybe long distance?

[@chrismarcoe9525]

Can you try the TNT'S wth Cfe Blk and IMR 4227 with 450 primers?

[@calebdoner]

Your powder shots with all of them lined up in the lids give me the jitters. I am so concerned about mixing powders that I only have one canister on my tabletop at any single time. Last thing I want is mixed powder.

[@colsoncustoms8994]

I accidentally dumped 1/2 a hopper of carver into a brand new bottle on longshot. Ended up shooting it in 9mm using reduced loads. The other way around (longshot in varget) would have been tossed out immediately.

[@robertrenta]

plzzzz include the cci br-4 primer

[@UncleDanBand64]

Hey Johnny Reload new subscriber here. I watched you reload for the Mosan how ever you spell that. With the Lee classic hand loader and you said you were gonna do one in 9mm. Have you made that video yet. If not please do.

[@JohnnysReloadingBench]

That video will be up within the next week. I will be showing 9mm and 357 Magnum.

[@UncleDanBand64]

Johnny's Reloading Bench Great that is the 2 calibers that I like to start with

[@glock17games]

Johnny's Reloading Bench speaking of 357, n110 makes for a good magnum load in those.

[@UncleDanBand64]

Johnny's Reloading Bench Will that Lee loader classic work ok for a Glock 19?

[@UncleDanBand64]

Hey bro will the Lee classic work ok to reload for a Glock 19?

[@ronstillwell3942]

may be that barrel is not stabilizing that bullet or that barrel just sucks

[@jimenagulla9081]

I think you need to stick with your current rifle set-up and just keep on tweaking, the more you jump around the more variables you enter into the mix, stick with it, just may be that the 10.3 barrel is just not accurate

[@vegapower454]

Johnny, are your upper receivers lapped?

[@jayjerger2620]

I am out of the loop, tell me more about this "quick load" data

[@tomkimbrel4192]

I thought I was the only person who had excessive extreme spreads!

[@1RobHunter1]

In Lil Gun, as you saw, 18.2gr is about max on FPS and with a 16" barrel I get 2250fps to 2300fps with under 1 MOA accuracy. Lil Gun likes the longer barrels. AR-Stoner Barrel, LC Brass, CCI 41 primer, Lil Gun. 2.075" OAL Lee factory crimp medium. That gives you constant release.

[@markg4956]

Anyone using reloader 7 with the 125gr ?

[@indianaoutdoors748]

How about shooting some premium loaded factory ammo to use as a benchmark?

[@cogunlover5550]

Use Winchester sr and Remington sr

[@kevinlawrence3497]

👍

[@truebornsonofliberty554]

Concussion will destroy that hand guard.

[@TimKollat]

nah, not with all the cut outs in it allowing the gasses to dissipate

[@truebornsonofliberty554]

mojo jojo lol. Let's watch together, shall we?

[@kentfallin5296]

Stay with the TNT and the short barrel. Most people are only building short 300 Blackout pistols these days. I load these bullets with W296 @ 18.2-18.3 gr.