300 blackout subsonic zeros- tested!

Lets take an in depth look at how the 11 yd, 50 yd, & 100 yd zero performs on a subsonic 300BLK out to 150 yds. The goal of this video is to provide real world down range data that shows exactly how each of these zero options can be expected to perform out of your short barrel 300BLK. We test each of these 3 zeros from 25-150 yds in 25yd increments and then provide a detailed review of the results at the end of the video.
Instagram: MountainsMulletsMerica
What am I shooting?
- AAC 9" 300BLK upper with 1/9" twist barrel
- Complete Griffin MK2 AR15 lower
- Griffin Dual Lo 7 Suppressor
- Zero Gravity 1.5" single piece scope mount
- Riton 1-10 LPVO
- Ammo: AAC 220gr .300BLK subsonic
00:00 Introductory comments
00:50 Rifle zero concept
02:23 Gear review
05:55 11 yard zero shooting
10:29 50 yard zero shooting
17:59 100 yard zero shooting
21:50 Shooting summary- introductory comments
22:44 11 yd zero review
24:36 50 yd zero review
26:30 100 yd zero reivew
27:46 My thoughts
29:12 closing comments

[@XRAYxxxFRST]

He had to pay for his own ammo instead of asking us to go play raid shadow legends for the 200th time like every other guntuber. At the very least he deserves a like and subscribe. Great content, keep it up brother!

[@TweakRacer]

I would suffer through an in-video ad if it affords this guntuber to keep producing content.

[@willo7734]

These battle zero episodes are great! I don’t see that type of useful content very much. You’ve single-handedly made the Mullet cool again!

[@toddjenest3212]

I agree. These videos are awesome. Very straight forward and easy to understand.

[@jonathanhochreiter8811]

This has been one of the most informative videos on 300 blkout ammo explained in a way that even I can understand

[@Pablo-sz8xn]

Stumbled on this dude and he's quickly becoming my favorite Guntuber. Straight to the point and explaining it in a direct way AND hitting topics that are Gun Education 2000 level.

[@tomi6261]

FANTASTIC video. I use a 10yrd zero on my 6.75" barrel Wilson 300 BO sbr. I am also running an Omega 300 suppressor fulltime, shooting my personal reloads with Berrys 220gr bullets which Chrono at 1050fps through my gun. 4 days ago, I took a wild hog at 155yrds, one shot right behind the shoulder, instant drop. The bottom of my red dot was resting right at the top of its back. And some food for thought for those who use a 300BO for personal defense - As this video proves, this zero shoots up to ~5" high out to about 75 yards. As a retired Cop, we train to shoot "Center Mass". Center mass of a silhouette is actually the BASE of the Sternum. If you measure 5" above your sternum base, well, that is a pretty optimal hit for a one shot stop. Love your videos and hope you keep pushing them out for a long time to come!

[@southbama]

That’s an awesome setup man I run a similar one with a DA nomad suppressor with a 1/5 barrel. I also have been using Berrys 220 but have noticed some jacket separation have you noticed the same?

[@tomi6261]

@@southbama No bonding issues at all. Double check your velocity with a good quality Chrono. You can not push a Berrys 220gr over 1000fps with that 1/5 twist. My barrel is a 1/7.

[@southbama]

@@tomi6261 ah that might be it. I’ve been running them at 1040.

[@donscherenberg8858]

P​@@southbama

[@RLBGM1]

Hello Tom why a 10 yard zero if I may ask please reply thanks. Also Tom are you running a scope or RDS

[@lihaikun]

This is GOLD for 300BLK shorty users. Thanks!

[@Mike750200]

I can't thank you enough for all of your efforts getting your channel going, for sticking with it, and for making some of the absolute best content that exists anywhere.

[@MountainsMulletsMerica]

Really appreciate the support! I’m having a blast growing the channel and so far it seems like people are enjoying my work. Lots of fresh content coming so hope you’ll stay tuned to check it out. Also do me a favor and share word about my channel with your buddies when you can!

[@hopewilliams6705]

​@@MountainsMulletsMericaI would really enjoy a video like this for 7.62×39 ! I'm having hell with my 10in barrel finding a good battle zero that doesn't fall have to large of an above or below

[@hopewilliams6705]

​@@MountainsMulletsMerica and I have a left side AK master mount red dot mount

[@husky701rider9]

Some of the best educational content ever. You’ve inspired me to do this with my setups to better understand my zeroes. Everyone’s setup is a little different.

[@MountainsMulletsMerica]

This is great! Really cool to hear you’ve found value in my content! Also you are spot on… the results shown here are directionally correct for all subsonic 300BLK but everyone has their own variables so they should do this kind of test on their own to understand how their specific setup is going to perform out to distance.

[@skorcher247]

Still the best practical and educational firearms content on KZbin! Keep it up the EXCELLENT work. We appreciate everything you’re doing.

[@05Dmax_LLY]

This is exactly the video I needed! Just wrapped up building a 10" 300blk SBR for sub-200 yd use. That 11 yd zero looks like the ticket!

[@RLBGM1]

Hello Reg again so are you running a scope or RDS with the 11 yard zero

[@05Dmax_LLY]

@@RLBGM1 At the moment I'm running a red dot with 3x magnifier

[@joshbruns6898]

Legit the most useful and informative guntuber in the game. Great job brother, your effort does not go unnoticed.

[@MountainsMulletsMerica]

Really awesome to hear you’re enjoying my content! I’m just a regular guy out here trying to make content that viewers find entertaining but also get some kind of valuable takeaway out of each video. Lots of new content in the works so hope you’ll stick around to check it out!

[@Swampytheroot]

I normally blow past videos over 10 minutes or so. I don't generally have much time to watch. I'm enjoying your longer videos like this one. Learning quite a bit as well. Thank you for making and sharing this sort of content.

[@229glock]

Honestly, the most clear explanation of zeroing. Brilliant.

[@MountainsMulletsMerica]

Really cool to hear you found value in watching this one! Lots more content just like this in the works so hope you’ll stay tuned!

[@NickBlazer-cf1vs]

Agreed. Saved us all a lot of time and money. Awesome stuff.

[@aightdenn]

You consistently make ballistics practical, relevant, easy to understand and interesting, all without a patronizing or overconfident attitude. I absolutely love your videos - especially this one since I love my .300 so much. Thanks for the great work.

[@southbama]

I feel that the 50 yard zero is the most practical. For defense and hunting purposes, I would not want to take subsonic beyond 50 yards and it’s good to see how accurate the zero is at shorter distances. I currently run this on a 7 inch honey badger 1/5 And have the same drop at 100 so I was really surprised with the 2 inch drop at 75 yards which is something I haven’t thought to try and reenforces my thought that 50 yards is the superior zero for subsonic purposes. Thank you so much for doing this video man!!

[@RLBGM1]

Hello Southbama just asking I didn't lick the 11 yard zero but I am not sure I would go with a 50 yard zero please explain why you choose the 50 yard zero

[@joebob4609]

85 yard zero with 208 grainers is what I went with ~2 inch maximum point blank range out to 100y. 2 high at 50y, 2 low at 100y.

[@scallyflex]

Griffin has great stuff! Their 9mm can QD system is probably the coolest I’ve seen.

[@jamesreed640]

Great information as always, keep up the great work and keep the data flowing!

[@matthewHizzle]

This video dropped at the perfect time. I’m loading 220 gr eldx, AA#9. Worked up from 7.6grains at 2.20COAL. All the way to 8.6. Ended up removing a buffer weight from a carbine buffer, standard spring. Pistol length gas 12.5 bcm. Form 1 can. It is so quiet and pleasant there’s no ringing like even when using a nail gun. This video will help me greatly. Thanks!

[@My-Nickel]

Lots of great information. Thank you so much for taking the time to make this video!

[@RobZtaco]

Thank you for the amazing work!

[@taylorpestana1809]

These videos save a ton of people a ton of time and headache figuring it out on their own. love it dude keep it up!

[@CH-pi6ef]

Thanks! What a great video. Very thorough, you approach with amazing perspective.

[@vanleermatt]

Great video with ACTUAL useful information.

[@Enostactical]

In glad you did this. You showed a lot of people that they don't know what they're are talking about thanks. Keep doing what you're doing.

[@benmac1395]

Awesome video. Keep the great content coming.

[@benjaminhuberty5888]

Best KZbinr explaining zeros and showing the results. Your 308 video was 👌 thanks for the work

[@robertbaldree7130]

Very well thought out and explained! No nonsense information and you provide concise details on what you're doing on each trial. Great job! You have a new subscriber with me.

[@m118lr]

REALLY liking YOUR latest uploads…’course they’re ALL great detailed work on YOUR part. THIS .300 BLK episode is spot-on great stuff. AND “Congrats” man on the Griffin Armament” SPONSORSHIP…!

[@Snoddude]

Another great video and of course, great shooting. I really appreciate the time you put into making these videos. I learn so much from your content. I don't presently own a 300 Blackout, but after watching your many videos involving the 300BLK, I have become a fan and will be looking for an upper very soon. Thanks for another awesome video.

[@nicholasdangelo8174]

I run that barrel on my 300blkout and it’s freaky accurate. With 125 SMK’s it will do right at 1 inch groups. Completely insane for a 9 inch. Great vid

[@BafflingBS]

I love your videos! They’re very informative and easy to understand.

[@davidcbrainard]

This is the best range test video I’ve ever seen. Direct and to the point. I’ve just purchased a 300BO upper that I’m hoping will prove to be reliable for my home defense gun. This video was incredibly informative. Thank you for all the time and effort you put into it.

[@leemarshall7519]

Awesome video. Thank you for making these. I’d love to see more calibers.

[@toddprobasco9728]

Great video! Well thought out, with an easy to understand explanation. Thank you.

[@revolutionanarchy713]

All your videos are great!!! Keep them coming!!!

[@MountainsMulletsMerica]

Really awesome to hear you’re enjoying my content! Lots of fresh videos in the works so hope you’ll stay tuned to check them out. Don’t forget to share word about the channel with your buddies!

[@jayfranklin14]

Ok, now mix and match subs and supers for each zero for the one to rule them all!!!! Great videos! Thanks for doing this.

[@twboegel2918]

I appreciate your time and effort 3M.

[@MountainsMulletsMerica]

Thank you! Really appreciate you taking the time to watch and support my channel!

[@arten]

I'm just starting with 300 Blackout. My scope should arrive tomorrow, and I plan to zero it this week. So this is very interesting, useful and timely information for me. Thank you for your attention to detail and your easy-to-understand description.

[@southbama]

YES!!!! Thank brother awesome video!

[@Cobra44Magnum]

I appreciate all the rounds you put down-range instead of just talking theoretically. I recently acquired a 10.5" 300 Blackout and am running it with a suppressor. I am getting similar results to what you are. I'm using different ammo and a slightly longer barrel. I really love hearing the paper slap. Awesomely quiet rig. Thank you for the video.

[@woodfamily5955]

Thank you for sharing this video. Really informative and I like your methodology. Just what I was looking for!

[@PatriotConsiderations]

Good video man. A lot of people don't really think about hold over/unders for zeros on shorter range guns, and it can bite ya if taking a low percentage shot in a risky situation. Great demonstration.

[@derekdelotto6370]

Love my 9" radian 300bllk. Great info, another informative video

[@gullahgeechee2699]

I have a 7in barrel with a 1:7 twist with a 2in barrel extension so It’ll gain some velocity.I’m thinking about suppressing it this year.

[@kylemorden4436]

This is an amazing video. Well done 👍

[@SMS828]

Thanks for another great topic!

[@SidewinderhuntsAZ]

Stumbled onto your channel and glad I did. Awesome work brother, keep it up

[@meanprochargedstang]

Awesome timing with this video, As I just finished my 8” 300blk sbr build and plan to only run sub’s through it. Looking like a 11 yard zero for me. Thanks a lot!

[@russhayes4882]

This was a great video very informative!

[@redrockmatt]

Excellent video and great information, really glad I found this and kuddos to you for doing such a great job with the information.

[@kuzz7919]

I watched the 300blk super video and this 300blk sub were very helpful and insightful !

[@thomasadams7429]

Thank you for making this video. I just got my can for my 300 blk and was puzzled on what zero to run with subs. Excellent video!

[@davidrahbany]

Great video. Interesting methodology and results. Excellent WY hat. Will consider moving to an 11 yard zero from my 36.

[@scottchordas1287]

Enjoys the pace of the information through the video. We’ll made.

[@ericreed8126]

Glad to see Griffin product on the channel. I run their multi-cal Optimus on most of my firearms. For 300 b.o. for my purpose, I ended up with a lpvo zeroed for supers and Griffin's M2 Sights with Angle Kit (45 degree offset folding iron sights) zeroed for subs.

[@edarnold99017]

Great content! Love 300 subs

[@armeddiver]

Thank you for the review and testing. It was extremely informative. My personal favorite cartridge is 300 BLK. Something I am very familiar with is how 220gr subs drop like a stone when they get past 100 yds. However, I was quite surprised by how much your subs dropped on a 50 yd zero. You have changed how and at what distances I will be doing my zeros with my various 300 BLK guns. I was extremely impressed with how good your groups were with a 9” gun. I just ordered a Sig MCX Spear LT with a 9” barrel. I hope I can shoot it as well as you did for this video. Again, thank you for making this video and sharing the results.

[@catfish1512]

Great video love the way you played it out

[@rayduncan9922]

Had the same mustache and haircut in 1983! Great video!! Saves me a lot of 300BO ammo.

[@Simply_chase]

Glad to see it. Im running a 10.3” i plan to only run suppressed with an adj gas block. Looking forward to this

[@FueledbyBlockchain]

I recently retired my MK18. Moved to an MCX 9” LT for CQB. I teach CQB classes as a contractor for the GOVT. I found the 25 yard zero or 75 feet, to be optimal. Holding low edge on center mass for anything below 25 yards and center mass for the rest gets me out to about 150 with about 4” of drop with supersonic ammo suppressed. Double that drop past 125 yards for supressed. Using Sig ammo for all tests. I have ran hand loads that perform better but honestly material costs to build a round have gone up so much it’s easier to buy box ammo.

[@locoflahute8916]

what optic do you run?

[@jimmystecher5214]

Great video. I just acquired a 300BO and was contemplating this question.

[@westtexas3041]

Another great video. Thank you.

[@KiYoOutdoors]

Digging the Ally Munitions shirt, was happy to see you on the pod recently. Keep up the great content

[@spysweeper]

You are starting an excellent series demonstrating actual real world practicalities!! I have an 8.6 Blk Out I'm working on and decided to zero Supersonic (MV 1900-2000/ 185gn) at 100 yds and just compensate for Subsonic (MV 1050-1100/ 225 gn) at closer distances. I'm finding my Subs are landing about 3 mils low from POA at 100 yds-- haven't shot closer yet since I'm trying to see how far I can push the 225 gn cup & core velocities before it disentegrates midair at a 1:3 twist!! Lol! -- Thanks for all your hard work. It is very useful specially that you are demonstrating it!!!

[@ForgottenRebel77]

really good visual on exactly how much gas is coming back on a suppressed SBR. thats wild.

[@MaxBechdel]

Really appreciate this video!

[@roul3688]

Excellent test. Thanks

[@micahwatts8204]

Useful information, thank you for the knowledge.

[@charlesolrich5898]

Best 300 BLK video on the tube! You got my sub. I’ve been wanting to do this for myself but with supers. Unfortunately I don’t have a can for subs. But I would like to try this out on deer!

[@maglish1]

Great stuff. Also like your supersonic zero.

[@conejoshiker3165]

Thank you for this! Very informative!!

[@TroyGerrard]

Very informative thanks ! Never really shot subs but might give it a try now

[@vincentdelaossa9740]

Great video, thanks for the information. Eotech has an optic they claim uses 2 dots bdc, interchangeable with subs and supers. Fine print reads its out of a 16 inch barrel but no mention of bullet grains.

[@TheWinterfan]

Awesome video, and perfect timing for me! I'll be zeroing my 300BO with Hornady Sub-X 190g for home defense as soon as my can is available for me to take home, but I also plan to run cheap 149g for range days

[@mauricejones2760]

Very informative video bro. I just got myself a 300 Blackout and will probably go with the 100 yard zero.

[@patriotfromthenoket6141]

Great content. Thank you for all your great videos. I plug in my HOB, BC, velocity into a ballistic calculator to find my maximum point blank range which I set at 2 inches. For my set up it gave me a 26 yard zero. When I change ammo it has to be redone. 300blk ammo is so different from round to round. I have one 300blk zeroed for subs and one zeroed for Supers. Makes it easy lol.

[@trogdor8634]

Another solid chunk of information.... thanks. Consider taking a cue from the torque test channel with a spreadsheet for purchase as the channel grows (save all the data you can)

[@forresthalley5981]

Well I'm impressed. That was a 30 minute video and it wasn't boring. Thanks for making sense of the whole zero business. I wish you had gone a little deeper with height over bore and how to calculate optimal zeros based on vital zones. Programs to use etc.

[@michaelharsey7111]

Great video! Love your stuff. Seems you get a lot of input from instagram so I miss out on that interaction. Anyway, I think a 30y subsonic zero translates well to a 100y long zero. There is a sweet Goldilocks spot between 11 and 50 that proves a very efficient battle zero nobody talks about. A lot of 300BO shooters are naturally interested in zero differences between super and subs. Context and purpose etc. I chased that rabbit and found a 30y subsonic zero serves well. I’d love to try one of the optics with built in bdc holds but for now I just either swap qd optics for context and I know my holds for either round I’m shooting at a given distance. Takes practice. Thanks for putting in the work for these videos. Well done.

[@stevenhall2408]

Seems I have to relearn zeroing every time I go to a new gun but you are making it much easier.

[@matthewdutcher80]

Your content is top notch! Well done.

[@MountainsMulletsMerica]

Thank you! Appreciate you taking the time to watch!

[@azmaddog6]

I have a Robinson XCR-L Mini with 2 barrels, 7.5" & 9.5" (SBR'd). The 7.5" to max subsonic and 9.5" to max supersonic for my uses. It takes about a minute to change barrels. I am in the process of figuring out my zero's as the upper receiver and therefore the optic does not change. The info in this video is a great starting point. I subbed and liked!

[@westtexas3041]

Outstanding episode.

[@MountainsMulletsMerica]

Really great to hear you found value in watching this one!

[@calebdoner]

Wow. Fantastic content. You earned my subscription for sure!

[@brianvechnak7396]

I enjoy your content. Also I'm from Wyoming and like the trucker hat!!

[@Cincinnatis]

Great info. Can’t believe I haven’t come across your channel before but I’m subbed now and looking forward to more 👌🏽

[@djphillips109]

New to this channel. Love the content and presentation. Gteat job. Thanks for the useful information. Priceless!

[@RobertSmith-xh4lx]

Exactly what I wanted to see.

[@jacklucas230]

This video deserves more views.

[@brandonjames3]

The only thing nicer than this video is your mullet. Great job on both.

[@Keith_White]

Interesting video. I'm glad you go back at the end and show the impact in inches. I've shot MOA for years so it means nothing to me when you say "2.5 mils low at 50."

[@EgoFiveFiveSix]

tons of great information once again.

[@MountainsMulletsMerica]

Appreciate you taking the time to watch! Really exciting to hear you’re finding value in watching my videos!

[@Roberto_14M]

Great vid. I zeroed mine with 110 vmax supers at 50 yds. Then took various subs and at 50 yds measured my drops and notated. Then put all information from different bullets in the kestrel and just add my drop calculation

[@jsu317]

Thank you for this subsonic video. 😊

[@MountainsMulletsMerica]

Man shooting subs is an absolute blast! I see more subsonic content in the future, mainly because I want to make more excuses to play with this setup haha

[@What___1931]

Thanks for your contribution to our knowledge! I now have some more practical knowledge for my own use :)

[@MountainsMulletsMerica]

Really appreciate you taking the time to watch! Glad to hear you found value in the video.

[@MountainsMulletsMerica]

Really appreciate you taking the time to watch! Glad to hear you found value in the video.

[@christaylor77723]

Awesome stuff, guys this data applies to a 1.5” mount only, all of the tall risers out there, 1.75 1.93 2.26 etc will have a significant impact changes as compared to this video. Rock on

[@maxsherro8729]

What zero are you rocking w 1.93

[@christaylor77723]

@@maxsherro8729 I’m not. 1.93 it for red dot applications only

[@pacifist8610]

Totally agree with your analysis and comments for battle zero on a red dot type of optic. I think the preferred zero changes with a BDC optic (like the Primary Arms 1-6 ACSS or PA 3x microprism for 300 BLK. Obviously your intent is then different (knowing your holds of the BDC vs just holding center mass with the battle zero). I've had good success with the 50 yard zeros on those two BDC optics. The manual for the 1-6 ACSS indicates a 110 gr supersonic load and a 220 sub can use the same zero at 50 yards. In my experience, its close but not exact. And then you just have to know the holds for supers vs subs to stretch out from there. Fun stuff!

[@cynickicksass]

EXCELLENT VIDEO! Thank you!

[@fmyles3]

Excellent production! My BLK is for HD. I load my own 190 sub x to 1100fps. 18y pb zero gets me height over bore (2.875) out to approx 121 yds. + or - 2.8” from zero to 121 works for hd purpose w subs.