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Old March 15, 2012, 05:20 AM   #14
Senior Member
Join Date: June 9, 2010
Location: NEPA
Posts: 874
There may be some dirt under your shellholder. The WSMs tend to have very tight chambers. I know that if you use a different brand of shellholder than your die company they are not machined to the same standards and people have had to sand off .001 from the top of the shellholder to kick the shoulders back enought.
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