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**Unclenick** · February 20, 2013, 12:41 PM

7.62×39 is made in both .311" and .308", the latter being an effort to try to standardize a little better. If you want best accuracy, you'll have to slug the barrel to see which he has. You can shoot the ammo for either in either without damage, AFAIK, but best accuracy requires you to get it right.

You'll also need to measure his loading die set. Check the expander ball. It will be a thousandth or so under the bullet diameter it is meant for.

February 20, 2013, 12:41 PM	#3
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	7.62×39 is made in both .311" and .308", the latter being an effort to try to standardize a little better. If you want best accuracy, you'll have to slug the barrel to see which he has. You can shoot the ammo for either in either without damage, AFAIK, but best accuracy requires you to get it right. You'll also need to measure his loading die set. Check the expander ball. It will be a thousandth or so under the bullet diameter it is meant for. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle