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"From the time you shot the brass to loading you did something different in preping the brass."
I'm puzzled. It's clear that case length affects how much the necks over lap seated bullets but I see no way for case length (or diameter) to affect OAL. Since the bottom of each case firmly rests on the shell holder/ram and the top of the bullet is firmly pushed down by the seating stem, how does anything about case prep matter to OAL?
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