My sizing die does not move the shoulder on fired brass. I can see on the neck that there is part of neck that does not get sized, therefore, the shoulder does not get bumped at all. This is with the die cammed over on the shell holder. It does not seem to affect accuracy, but after 3 firings the brass has hardened enough that it takes some pressure to chamber the round.

I use a Forster competition full length sizing die with rcbs shell holders in an rcbs press.

I know after 3 firings I need to anneal, but I want to make sure I am bumping the shoulder before I start that. Any suggestions/methods for either removing material from the bottom of the die or, the top of the shell holder?