valad:

From what you describe, your full length re-sizing die may have been improperly adjusted and was not sizing the case enough to allow it to fully re-enter the chamber i.e. when sizing, the case did not go into the die enough to resize the base of the case.

One of the other posters is suggesting you pull the loaded bullets, adjust your die down in the press more, and re-size the cases; check after re-sizing by loading each re-sized case and that each allows a closed bolt with minimal pressure to do so.

When re-sizing after pulling the bullets, take out the de-priming pin from the FL sizing die and you won't have to knock out the unfired primer.

Last edited by BuckeyeSpecial; 03/08/14.