Home Forums Hunting & Shooting AR and Tactical Rifles School me on the 300 Blackout in an AR

My son in law is looking at an AR15 in 300 Blackout.

I don't have any personal knowledge of this cal.

What can you tell me about it?


Thanks! Virgil B.

It will be roadkill in 10 years, not worth the effort.... 6.8 will always have a hunting niche.

It's a modern 30/30, give or take. If he is looking for a suppressed hunting round, there is something to be said for it. If he's looking for a high velocity round I'd personally opt keeping it a 5.56.

I just picked up an 8.5" upper from PSA to use with a suppressor. Easy switch from 223 and very versatile with light bullets for hunting or heavies for QUIET plinking...

300 bo will be around if nothing else for the guys running suppressors.

I starting shooting its predecesor 300 whisper out of a Thompson Contender single shot in 1999. I still have the Contender but also a SBR Noveske AR 10.5 inch barrel.

Lots of haters of this round but I am not one. I have killed over 50 whitetails with this round both subsonic suppressed and supersonic.

Its all about bullet placement. So far no run offs, most deer drop within 20 yds or so. I farm and have kill permits from the state. I have a Ruger in .308 Win that rarely gets used.

its a suppressor round, if you want a suppressed gun get a BO. Not a hater, if your not going to suppress it the 5.56 makes infinitely more sense, cost to shoot good bullets, flatter trajectory, just as lethal, practice ammo everywhere. To hunt in a no 22 state I would say get the 6.8.

This covers my thoughts... in a no 22 state it would not be just my go to round, 6.8 or others that are out there would cover it better without a can IMHO.

Thanks guys!

I'll pass on the information to my son in law.

Sounds to me like he'd be better off with a 5.56

Virgil B.

My son is 38 and is building a 300 BO. I am not sure why but that's what he wants. He will suppress it.
But he does have a 223 for serious work.

I have one, a Daniel Defense M4V5. I previously had a CMMG, and the DD is more accurate. Both guns are completely reliable.

I like the 300 BO myself. Supersonic it's a .30 carbine on steroids, especially when loaded with good bullets, which is a good thing. Subs are a specialty round but work well, too.

Sorta, but I think it's more accurately described as the AR15 version of the 7.62x39.

I still find it odd how guys who think the AK round is perfectly adequate, but insist the 300 Blk is only good for subsonics. I guess some people still think headstamps matter more than what comes out the muzzle.

I also see it as the American version of the 7.62x39.

Don't have one, but plan on putting an upper together one of these times.

Common bolt and magazine with the 5.56 is easy for me to like.

Leaving behind the 30-30 I was never impressed with the 7.62x39 except for cheap plinking. The 300 Whisper intrigues me as a sub sonic round but offers nothing over the 223 to me at least for my uses.

I have no hate for the round, just hate the hype that it was introduced with.

this is the skinny on the 300 black. decent at short range really nothing else.

good video..whispering death...1000 yard snipers...too funny.

If you are gonna build an AR pistol, I'd go with the 300BO for that too.

Me either, but mainly because of bullet selection, not power. The difference in power isn't enough for an animal to notice one way or another, and the 300 isn't hampered by poor bullet selection like the AK round.

Been over this before, but you are as stubborn as I am.... x39 supersonic, ammo all over the place to buy, can run it in 308 or 311 barrels, never seen a problem,cheap plinker. Kills fine.

Why go a a 300/221 and have to form brass, or buy formed brass, expensive super sonic ammo, and so on, if all you are going to do is blast with supersonic, the way to go is obvious.

If you want to go sub, the way is obvious that the 300/221 now has a legit use, but I"d have no issues going sub with the x39 either.

Heck to do it all, go x39 from the start and have the best of all worlds.

at least the BO can kill a pig. 223 can't.