Quote Originally Posted by bigedp51 View Post
Just measure a few fired cases with the Hornady cartridges case headspace gauge and then set the die to bump the shoulder back .001 to .002.

After firing the case springs back from the chamber walls and is smaller than chamber dimensions. This is good because the case can be extracted without binding and easy bolt movement.
^^^That.

You want the case close to the size of a fired case. BUT not so close that "in the field" in hunting/dirty/different temperatures it doesn't close in the action. Measure the shoulder on a fired case and measure the shoulder on a resized case. Use the case holder that is just below that difference.

(I thought I did answer that question up above(?))