madmikes Posted May 17, 2012 Report Share Posted May 17, 2012 Whats the difference between a 762X51 and Winchester 308 chamberings? Quote Link to comment Share on other sites More sharing options...
Grunt Medic TXARNG Posted May 17, 2012 Report Share Posted May 17, 2012 Dimensionally, almost none. That is, the case dimensions are such that both cartridges will fit, feed and fire in any rifle designed for either.The only issue is when firing older military surplus rifles (or rifles made from parts kits with original barrels, or barrels made to original specs) designed for the military chambering - the 7.62x51mm NATO round has a significantly lower pressure level than the civilian .308. Modern production rifles are proofed to the higher levels, and can shoot both with no problem. Rifles marked '.308' can shoot the lower pressure 7.62 with no problem. But if you shoot .308 through a surplus rifle proofed only to the NATO standard (7.62 M1 Garand, FN FAL, CETME, G3 and similar) you may be stressing your rifle with significantly higher chamber pressures than it was designed to take.Does that completely answer your question? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.