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Old December 2, 2012, 07:31 PM   #31
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Join Date: August 1, 2010
Location: Tampa Bay
Posts: 4,371
When done correctly, FL sizing won't overwork the brass.
Whenever I come across posts about resizing done without the use of a comparative headspace measurement (as in using the LNL gauge) I wonder what they're thinking; there's no way to get correct shoulder bump without it.

Sure, you can just screw the die down to the shellplate, but you might end up bumping back too far (still within SAAMI spec- but too far for your particular chamber)...

As said, bushing dies (gotta get me these) assure proper neck tension. Get a bushing one thou smaller than your fireformed case neck, and voila...correct neck tension tailored specifically to your chamber.
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