300 Blackout Accuracy

[DMW1116]

I've reconsidered my unwillingness to get into a new caliber for my latest rifle project. What kind of accuracy can I expect from a 300 Blackout in an AR style rifle? Is it a round that struggles with accuracy? At this time, the intent is to use a 16" barrel, but I may change my mind to a 10.5" depending on my mood and what's available when I get to the barrel buying stage.

 

[Havok7416]

There isn't a round (cartridge) out there with an accuracy problem. There are however lots of individual firearms that can have an issue. Accuracy from an AR chambered in .300 BO is no different from any other similarly arranged AR. Call it 2-4 MOA for typical accuracy off the AR platform.

 

[Jonny2guns]

I get 1 moa out of mine with a pistol bbl.

 

[mcb]

Buy a quality barrel and use quality ammunition and 300 BO will do well for you. I really enjoy 300 BO as a general purpose cartridge.

 

[jonnyc]

I have 16 and 10.5 inchers, and I find the .300 to be a bit more accurate in both lengths over the 62 gr. 5.56 I also shoot.

 

[mavracer]

The cartridge itself is plenty accurate. I've got a Ruger American Ranch that shoots under an inch @100 easily. My AR has a 10.5" barrel and a LPVO that doesn't provide for pinpoint precision and it'll still shoot close to that.

 

[Anchorite]

Step son has one in an AR. Darn thing is silly accurate for its design parameters. I wouldn’t hesitate to use it for short range game (<50 yards), but there are better choices for deer/badgers/hogs, etc.

We load 150gr FMJ (pulled) and H110. I think the fact it burns H110 makes it an attractive option for us.

 

[Varminterror]

Good scope for the targets, good barrel, good trigger, good ammo, and good shooter behind it, and it’ll hold 1moa at 100. Otherwise, at least one of those isn’t good.

 

[cfullgraf]

I got down to 1.25-1.5 MOA at 100 yards when I moved on to other projects. I planned get back to 300 BO but have not past 10 years

For my purposes, the accuracy is adequate but I feel it can do better. At the time I was looking mostly at velocity, but the loads all were in my posted accuracy range. I never got back to optimizing accuracy.

I dabbled with 110 gr, 125 gr, and 150-155 grain bullets from the major brands. All performed well.

My favorite powders are W296/H110 and Accurate 1680 using published load data. There are other powders favored by other folks.

My rifles have 16” and 18” barrels. I’m happy with supersonic loads but have no issue with folks that want to do subsonic suppressed hunting.

I did play a bit with a 200+gr bullet subsonic load and it was a bit more finicky to get good accuracy. But I did not play with the combination very hard.

The cartridge is easy to load well. I began working with 300 BO when commercial cases were few and far between. I formed many of my own cases at that time. Easy to do but it does take a little time. Commercial cases are more available these days.

 

[DMW1116]

I’m still on the fence about getting into a new caliber. The only components I HAVE to get would be powder. I have SRP and I use 150 grain bullets in my 308. That said sometimes it’s best to stick with what you know, which is supersonic 308 and 223/556 and dabbling in subsonic 308 and 30/30.

 

[Plano11]

My LMT 10.5" 300 BLK shoots under an inch with handloaded Barnes 110gr bullets, but its a 1-7 twist

 

[eastbank]

my 300 bk is a rem md 7 aac with 16: barrel and shoots very well. in my bolt rifle i use lit-gun with 125-150 gr bullets.

 

[nastynatesfish]

Go to YouTube and search 300blackout Johnnys reloading

 

[W.E.G.]

A good bullet through a good barrel usually delivers good accuracy.

You get what you pay for in equipment and ammunition.

 

[bangswitch]

I've reconsidered my unwillingness to get into a new caliber for my latest rifle project. What kind of accuracy can I expect from a 300 Blackout in an AR style rifle? Is it a round that struggles with accuracy? At this time, the intent is to use a 16" barrel, but I may change my mind to a 10.5" depending on my mood and what's available when I get to the barrel buying stage.

I consistently hit an 8" gong at 200 yards with my M4 300BLK (16" barrel) using a 1X red dot. Ammo is either a 155 SMK at 1950 fps or a 125 Nosler ballistic tip at 2100 fps.I can hit a 12" gong at 300 yards once I figure my holdover Having a good barrel is important. I built my rifle, has a Rainier Match barrel.

 

[Sistema1927]

My question would be what kind of accuracy can one expect with an 8.5" barrel suppressed with subsonics? Guess I will soon find out since my stamps are back.

 

[jmorris]

Only problem I had was finding a bullet that worked well on pigs. Lots of them shot well, just didn’t do the best job once they got there.

 

[mavracer]

My question would be what kind of accuracy can one expect with an 8.5" barrel suppressed with subsonics? Guess I will soon find out since my stamps are back.

Subs can be very accurate within their limits. My issue is like most I have a red dot on my 7.5" and astigmatism so precision sight picture is an issue, my 10.5" SBR has a 1-5X scope and is easily 1.5-2 MOA at 100 maybe some day I'll stick a more precision oriented optic on it and see just what it'll do.

 

[mcb]

Shooting 220gr subsonic at 200-250 yards is fun. On a bright sunny day you can watch the bullets go down range and call your hits before they even hit the steel.

 

[Gordon]

My son and mine deer hunting around our property caliber. We shoot carefully developed 220 HP blemish Sierra Match King bullets with Accurate 7 powder to get 1100 fps out of 8.5" barrel his or mine 10.5 barrel . To 200 yards with 1-6 or 1-8 Vortex Strike eagles we get 3" off bipods from good quality barrels and triggers. The big long bullets penetrate well and tumble and kill the local blacktails well. I killed a couple Monterey California wild hogs with it a few years back with supersonic 125 grain bullets very well as suppressors not ok in California. We also share a 16" Target
300 upper sighted in for that 125 grain load at 2200 fps and that is very accurate, hovering at 2" at 200 yards. It has a 3-9 scope with a BDC correction to 400 yards . I am sure that is great Whitetail medicine out to 250 or so yards. The .300 Black out is exterior ballistic equal to the 7.62 x39 , which is known to be close to a 30-30 in exterior ballistics. For suppressed shooting for deer within .300 yards it works out standing. We fooled with 150 grain soft points with the first 16" upper in California right when Calif went unleaded bullets. We found the Supersonic 2200 pistol length and 2300 fps carbine length 125 grain hunting bullets purpose designed for .300 BO to work better and more accurate.
We really like the .300 BO works great from Magpul .300 mags or Lancer and other mags, everything feeds well . Now we are fooling with .458 Socom as my sons' ( yes another son more North western Oregon on a Lake) has abundant elk and want to try suppressed 405 grain bullets suppressed for them and night raiding bears which all our places have . We have Tromix 12" fast twist and 16 " .458 Socom uppers .My Son likes 45-70 Marlin level loads from 16" and me suppressed 405 grain loads in 12 " . Just giving you ideas.

 

[gotboostvr]

My question would be what kind of accuracy can one expect with an 8.5" barrel suppressed with subsonics? Guess I will soon find out since my stamps are back.

It can be very mechanically accurate.

The hard part will be figuring drift and drop.

Not unmanageable out to 200-250, but certainly more figuring than a 5.56.