7.62X39 AR???

[ABNAK]

I know it's a CMMG piece and how "highly" (not!) they're regarded around here but what about the Mutant? Anyone have any experience with one?

[53dannyboy]

Anybody handload for a 7.62x39 AR?
Can you get better ballistics out of it than factory ammo?

Larry I have no personal knowledge of this as I don't load for this caliber, but I have a friend in Arkansas that does (brass cases) and he gets much better accuracy.

[ABNAK]

Hornady makes a ballistic tip loaded in steel cases for 7.62x39.

[rabbitcop]

300blk is at $.50 a round now. Why bother with 762x39


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[rpoL98]

last time i bought 7.62x39 ammo, it was $0.25 a round. if you shoot three 30-rd mags, that's $20 saved. i go through a lot more than that easily on a range day. maybe that's chicken feed to you, but to me, that's real money. i already have the gun and beaucoup mags, so that's sunk cost, now i'm just into the part of enjoying cheap ammo.

[HelloLarry]

Larry I have no personal knowledge of this as I don't load for this caliber, but I have a friend in Arkansas that does (brass cases) and he gets much better accuracy.

I understand that it's only loaded to about 45K PSI and barely 2,400 FPS. I just wonder what would happen if it was loaded to 60K PSI like the 5.56. Seems like it ought to be able to drive a 125 gr bullet to 2,600fps given it's capacity.

[Lefty223]

300blk is at $.50 a round now. Why bother with 762x39

... because when I bought it was only $0.15 to $0.20 per round, lol!

Shoot the -39mm bulk ammo out of a bolt action rifle, AR or even a good SKS (Norincos shine in this regard) and accuracy is better than you'd believe, easily 1-2 MOA. PMC soft-points, admittedly not bulk surplus (but a great deer cartridge for Eastern states), shoots sub MOA in my left-handed Zastava mini-Mauser bolt action, while bulk stuff (Golden Tiger or Brown Bear) is still great, easily < 2. My -39mm AR loves the Brown Bear ammo, shot some 1-5/8" groups @ 200-yards. But I think the adjustable gas port helps.

[constructor]

From Hornady's website-

300 Blackout 125 gr HP American Gunner®








Ballistics




Test Barrel (16") Velocity (fps) / Energy (ft-lbs)
Muzzle 100 200 300
2175/1313 1932/1036 1707/809 1504/627
Trajectory (inches)
Muzzle 100 200 300
-1.50 3.90 0.00 -15.90

7.62X39 123 gr SST® Steel Case





Ballistics
Videos




Test Barrel (20") Velocity (fps) / Energy (ft-lbs)
Muzzle 100 200 300 400 500
2350/1508 2040/1136 1755/841 1502/616 1289/454 1129/348
Trajectory (inches)
Muzzle 100 200 300 400 500
-1.50 3.50 0.00 -14.80 -45.20 -96.60

[rabbitcop]

I guess this is what I get for shooting off without explaining my perspective very well.

Constructor, I am not doubting the superior ballistics of the 762x39 over the 300Blk. Obviously that has been made clear. I also want to thank you for my amazing ARP 68 barrel. It is my go-to for MOA accuracy and hunting.

That being said, I built a 300blk pistol for a few reasons. I like how quiet it is with even a home built suppressor (all NFA rules were followed) and I like being able to readily find 220gr subs for it. That was my point. Subs are cheap and it is quiet. A few points off from the 762x39 doesn't bother me. My 300blk is more accurate than I anticipated and very capable to 200+ yards

Thank you for your understanding, guys. I hope I haven't upset you. Thank you again, Constructor! You are an invaluable asset to the gun toting community


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[Squib308]

bumping this thread because i recently sheered the extractor off my windham 7.62x39. i plan to call windham shortly to see if they'd be willing to provide me with a replacement extractor. the worrisome part, however, is that i only have 1300 rds through it. anyone out there with expertise on 7.62x39 extractors? any tricks to improve their survival such as running a heavier buffer? part of my concern is that with it failing so early, the bolt may benefit from some slight delay prior to pulling back on the steel case?

i'm not looking to be reprimanded for running an AR in 7.62x39. it has major quirks no question about that. i also run 300 blk and 5.56. each are wonderful. the value of the 7.62x39 (at least IMO) is cheap, hits hard and just fun at the range. it's not a serious or defensive setup, just a fun one.

expertise on the extractor issue much appreciated!!