I have 400 pieces of lake city 300 blk brass primed with CCI 450’s. The neck on these is a little rough everything I read says hit it with a neck sizing die will help with that it’s almost like there is a little burr on it. Unfortunately I don’t have a sizing die to try it out and am getting out of the blackout all together. The headstamp says LC 12. Asking $110 shipped
