Bore diameter for 7.62x39 AR barrel?

[mmattockx]

So, if I was ordering a custom AR barrel chambered in 7.62x39 what bore should I choose, .308" or .310"? Plan is for a 10.5" PDW style shorty, so it doesn't have to be super match grade or any special heavy profile.


Thanks,
Mark

 

[enefgee]

I'd go 310 - the bullets are widely available, for when the surplus runs out.

 

[hbean]

Go with .310 some of the early Ruger Mini 30 had a .308 bore and there were feeding problems with 7.62x39 ammo

 

[mmattockx]

.310" it is, thanks guys.


Mark

 

[sunray]

7.62 x 39 uses .311" bullets. Hope you'e buying the barrel in Canada. AR parts require the daft export permit.