300 black out...an idea
- Thread starter Hermid
- Start date
7.62 Russian calibers = .310 to .312 diameter. North American 30 cal/7.62 = .308 diameter. If you're trying to use it in a 7.62x39 bore it could be a loose fit and therefore inaccurate, though some have reported success in certain rifles. Some .310/.311/.312 bullets are available. If you want to play around with heavier bullets, the .303 British is also .310-.312. Not sure where you'd find load data for the heavier bullets though.
Not really. What we do is install a 308 dia barrel on a Enfield or Mauser and then chamber to 308. We don't run a 308 reamer into a 8mm barrel.
From what I've heard it's a hit and miss proposition. Some .303's and Mosin Nagants for example, will stabilize a .308 bullet and manage a fair degree of accuracy. I'd suspect this is mainly in guns with tighter bores around the .310 mark with flat based bullets deforming slightly to make up the gap. Things being what they are with the manufacturing tolerances of those rifles, the bore can run as large as .314. One of these rifles would probably not shoot the .308 bullets well. A better bet is probably to track down some .310 or .312 bullets in the weight you're interested in. I've got up to 205 grain in that size.
What rifle were you thinking of trying this in?
