hunter24605
Handloader
- Apr 30, 2016
- 2,396
- 3,710
I thought I was seeing signs of high pressure at the range because the primers looked to be cratered..Closer inspection at home, the primers still have nice rounded edges and not flat..Seems to me in an over pressure situation, the would flatten first then crater..But looking at my bolt there is a pronounced chamfer around the firing pin hole..I may be off base, but I think this chamfer may be the culprit for the "crater"..The "cratering" does go away when I reduce the charge a good bit, approaching the minimum..This is a new model 70 CRF bolt... These are CCI primers