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Message: <blockquote data-quote="technetium-99m" data-source="post: 1818872" data-attributes="member: 3615"><p>After you seat a bullet take out your calipers and measure the outside diameter of the case below your bell.  When crimping the idea is to get rid of that bell you put in to aid bullet seating.  I personally take the bell out and then put maybe another 1-2 thousandths of crimp on.  That's it, don't crimp any more than that.  With straight walled pistol cases the tension the case has on the bullet is doing more for you than your crimp with setback prevention.</p></blockquote><p></p>