Since 30/30 cases headspace on the rim I size only enough to set the shoulder back a couple of thousands so the round will chamber. As Guffy has suggested use a feeler gage between the shell holder and case head to limit setting the shoulder back no more than necessary to ensure reliable feeding. FWIW my sizing die is set .011" off the shell holder for my chamber.. William
Last edited by William T. Watts; November 8, 2011 at 08:29 PM.
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