Thread: Neck Tension Issue... I think

Once an immunologist by any chance? Is the sizing die a bushing die or does it have an expander mandrel? You didn't change bushings or remove the mandrel (be pretty hard to seat into a case resized without the mandrel I'd imagine). Try seating a bullet back into the cases you pulled the bullets out of. Grab the press handle down close to the press to get a better feel of the resistance needed to seat a bullet. Pressure issues when you weren't expecting it? You didn't change primer brands or switch to a new batch of powder? are you keeping the brass trimmed regularly? you don't have a dodgy cheap electronic scale or a worn out old beam balance? Are you measuring your OAL off the ogive on all loads (i.e. OAL not creeping up)/checking for adequate shoulder bump after brass sizing.