And it's probably not Lake City brass, per se (good stuff), but what fired it last that's the issue. Lot's of it is once-fired machine gun feed, and the rims are often bent back by that experience, but not all over. Set them up on a table and see if any of them lean to the side. If not, it's probably still just a matter of them having been too long at one point and springing back a lot coming out of the sizing die.
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Last edited by Unclenick; March 15, 2012 at 01:06 PM.