Thread: Neck Tension Issue... I think

Originally Posted by yerimaginaryM8

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.

- immunologist: once upon a time, yes
- dies are your stock standard rcbs dies
- none were Noticeably difficult to seat from memory, is there something that could cause some to be more difficult than others? How would I control for that?
- unexpected pressure in that I'd fired that charge before without any issue then that same charge caused very sticky bolt consistently after even though the charge was the same (yes, weighed extras from the same batch)
-primers and powder the same
-brass trimmed to spec
-beam scale is accurate as far as I'm aware. I calibrate regularly because science.
- measuring OAL off ogive for each bullet