Hmm.
Wonder if it is pre LC contract...
You mean the web is thin?
Or the walls just ahead of the web?
I suspect the crimped primers and ATK taking over the Lake City plant in 2000 happened about the same time.
The web is thin. One or two loads and the primer pocket expands. I check several that I scrapped and some were ok and some were noticeably thinner. I set up my RCBS press mounted primer pocket swage, which uses a punch though the case mouth to push the shell case down onto the "nipple" that swages the crimp into the head. Set up for a normal case some of the big FC cases were a loose fit. If I had a large number of the big FC cases that is how I would segregate the "thin" from the normal.
Thanks I was thinking of how to measure the web..
As measuring depth from neck would be meaningless.
A drill press might work. But the stop adjustment isn't nearly as fine as a sizing press.
How long they last depends on how hot you load them too. Less pressure less stretch.
Good for sub Sonics at least.
