[amosfella]

Originally Posted by gitrdun

Myself, I use the Sinclair Shoulder Bump Gauges. No guess work, you know exactly how much of a bump back you've re-sized your brass to.

http://www.sinclairintl.com/reloadin...prod35265.aspx

Theoretically, one could use a dial gauge to determine the bump back. If one could feel where the case shoulder met the die then turn it in a few more thou...