Case headspace issue
The die resizes the brass body as well. When the brass is squeezed to a smaller diameter, the shoulder can go forward if there is room for it to do so. It is possible to have a longer brass after resizing. Just screw down the die 1/8 of a turn. You should see -0.005".
Another possibility is that the expander ball pulls the shoulder back up. To rule this out, try taking out the expander ball, size and remeasure.
-TL
Last edited by tangolima; June 11, 2014 at 02:45 AM.
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