A buddy gave me a bunch of old .308 that was so old the cardboard was falling apart. none of the rounds would fire despite good primer strikes.
so I pulled all of the bullets hoping to use them as plinkers. they weigh in at about 142 grains, and the best I can get out of the diameter seems to be about .3065. I measured some speer,hornady and sierra hunting bullets I have and they all got an honest good .3075,
I tried to show the cup in the tail and the crimp indentation
I shot them out of both a .30-06 and a .30-30 (single shot of course) and they were terrible
any body got any ideas why I couldn't get a decent group out of em?