Thread: Case lengthening when bump sizing

Originally Posted by ebf

Ok, so here is an experiment for you.

Get a shoulder bump / body die that is correctly set up. After firing, size your case, but DO NOT trim it. Keep doing this for several iterations. At some point your case will not chamber. The reason for this has nothing to do with the shoulder (you are sizing that and the base of the case body every time remember).

Not quite sure I understand. Are you saying to size the case multiple times?
I'm not sure how that's possible unless you pushing the shoulder back a little further each time, and end up going shorter than that the chamber. Is this what you mean?
Once its sized correctly the first time, then no matter how many times you push the brass into the same die, nothing should change.