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Old June 15, 2012, 07:46 PM   #7
drail
Junior member
 
Join Date: February 2, 2008
Posts: 3,150
Measure the dia. of your expander die plug. Measure a bullet. If the plug is not 3 or 4 thous. smaller than the bullet then it is overexpanding your case. This has nothing to do with flare. If your plug is oversized for your bullet then chuck it in a drill and turn it down til it is under bullet dia. You should be able to seat a bullet with no crimp and not be able to push it into the case by pressing it against the edge of the bench no matter how hard you push.
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