I realize that you are a handloader and have been experimenting with different loads in this Luger, but I have to ask if you have tried factory ammo that frequently has the case shoulder set back farther than many sizing dies will set it back, without "tuning" of the sizing die. The 7.65P round headspaces on the case shoulder and not the case mouth. I am having a hard time understanding how shortening the OAL of the brass is helping you with RTB problems.
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