So I’m fairly new to reloading, I have been doing it about 3years and never had any problems, but I had a new rifle built for the first time and bought new brass, 22creedmoor, Peterson Brass, 75gr eldms, 41grs H4350, 3288fps, 20” barrel, suppressed, 180rounds on new brass, no pressure signs. I am seated way off the lands. I started reloading my 1xshot brass and today I shot 23rds, and had 3 at the end that had pretty heavy bolt lift and ejector marks and heavy bolt closure, so I called it quits, but velocity was normal, they measure 1.521 to the shoulder. The 20 others measure 1.520 and no pressure or heavy bolt lift or close.
In my notes the virgin cases were 1.516 and grew to 1.519 so I resized them to 1.517. What did I do wrong on those 3 cases? It is possible that I was adjusting die on those 3 cases and had to much shoulder bump or not enough? Why the pressure? What should I bump shoulder back too now? Can I use those 3 cases again? The barrel still seems to be speeding up a bit so I may have to back off a touch, but I really think it was something I did wrong with those 3 cases.
Thanks
In my notes the virgin cases were 1.516 and grew to 1.519 so I resized them to 1.517. What did I do wrong on those 3 cases? It is possible that I was adjusting die on those 3 cases and had to much shoulder bump or not enough? Why the pressure? What should I bump shoulder back too now? Can I use those 3 cases again? The barrel still seems to be speeding up a bit so I may have to back off a touch, but I really think it was something I did wrong with those 3 cases.
Thanks
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