What Size Is 7.62x25 Tok, Anyway?

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Dogfish858

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I'm getting specs from .308 to .311. I'd like to use an old Enfield barrel at .312. Am I supposed to believe our efficient communist friends set up an extra line of tooling in order to cut Tok barrels a smidgen smaller than all their other armaments? Is the .308 bore simply wishful American thinking (cause they seem to have a lot of that)?

Does it even matter and should I just cut it anyway?
 
Nevermind CIP gives .3118 so .312. If you have any experience measuring the cartridges themselves it'd be helpful to know what to expect.
 
While working on an M1 carbine 7.62 X 25 TOK conversion, I pulled a number of bullets (Russky and Czech) and they mic'd at 0.307 -0.308 dia. Used them to reload into .30 carbine brass and shot them out of USGI M1 carbine. Groups no better nor worse than std .30 carbine at 75 yds.

So, .308 bore (ie 30-06, 7.62 NATO, and .30 carbine) barrel seems to work fine.
 
The measurement I took today with my vernier calipers was weeny smidge under .311. I had always assumed they were .308 until I saw the OP's post, and decided to measure for myself. Then for poops and giggles, measured some pulled 7.62x39 bullets. The large diameter on those are .311.
 
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