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Old October 24, 2011, 03:12 AM   #5
FrankenMauser
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Join Date: August 25, 2008
Location: In the valley above the plain
Posts: 13,424
Quote:
Flat primers are usually a sign of excessive headspace. How far back are bumping the shoulder?
The illusion of excessive headspace can be mimicked by lubricated ammunition...



Clean the lube off the brass, and try the loads again.
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