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Old July 9, 1999, 12:06 AM   #2
Senior Member
Join Date: June 16, 1999
Posts: 120
I use my Precision Mic for 223 to compare the headspace dimension of cases fired in several 223 rifles so that I can set my FL die to set the shoulder back about .001" from the fired dimension. This insures that I'm not over-working the brass, and at the same time, am sizing it enough to give reliable chambering in each rifle.
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