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Message: <blockquote data-quote="Larry Morgan" data-source="post: 2810824" data-attributes="member: 4676"><p>I have nearly the same press, except it's the older 3 hole style. When I FL size, I can usually hold the bump amount to +/-.001". I always make it bottom out on the shell holder though. Otherwise there are way too many variables. I tried  sizing them without it touching... ONCE. Nearly drove myself crazy. But with the shellholder touching, the only thing that can theoretically cause it to change are actually compressing the shellholder and die (HARD HARD) and brass properties (Likely).</p></blockquote><p></p>