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Old May 4, 2000, 12:01 PM   #4
Robert the41MagFan
Senior Member
 
Join Date: November 18, 1999
Posts: 1,233
Is the new brass? Same lot? Once fired brass has a tendency to vary the AOL. Also, a uneven stroke of the lever will do the same. The bulging, as stated before, is caused by too much pressure when crimping or not resizing properly. Not enough bell to allow the bullet to enter the case properly will do the same. A finished product should measure .470" at the mouth, under .470" at the belly and .472" at the very tail of the case.

You can try to run the bullets through the press twice. Once to install the bullet, the other to crimp only. Start with only a 1/4 turn to crimp.

Robert
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