I'm loading my first .308s, a 150 grain FMJ from Midway
My Sierra manual lists 2.775". I have mine seated to 2.770 since I get .002 to .003" jump when the round is chambered. I'm not crimping. When I seated the bullet, there is still (I estimate, didn't measure) about .0625" of copper showing between the mouth of the case and the bottom of the cannalure.
If I had been crimping the bullet to the bottom of the cannalure it would be seated to at least 2.70, maybe less. Would that have presented pressure problems?
My Sierra manual lists 2.775". I have mine seated to 2.770 since I get .002 to .003" jump when the round is chambered. I'm not crimping. When I seated the bullet, there is still (I estimate, didn't measure) about .0625" of copper showing between the mouth of the case and the bottom of the cannalure.
If I had been crimping the bullet to the bottom of the cannalure it would be seated to at least 2.70, maybe less. Would that have presented pressure problems?