What would cause this?
Reloading for 22-250 ruger, used winchester, remington, and federal brass. Win LR primers, IMR-3031 powder, and winchester 55gr PSP.
Working up loads for each brass type was 5 each 31gr. 31.5gr 32gr, and 32.5 gr.
Winchester grouped best at 32.5gr with .60" group, remington grouped best at 31.5gr with. 69" group, federal brass is where I started having problems, first shot with third group at 32gr had ruptured primer so I stopped there and rechecked the other brass and found the fifth shot from the first load done the same thing, puzzles me what would cause this weak brass maybe.
Also each box was shot on different days with a couple minutes between each shot, temperature was in the mid fourtyies.
I have picture but don't know how to post it, pin hole on outside edge of primers. Eny thoughts are appreciated.
Reloading for 22-250 ruger, used winchester, remington, and federal brass. Win LR primers, IMR-3031 powder, and winchester 55gr PSP.
Working up loads for each brass type was 5 each 31gr. 31.5gr 32gr, and 32.5 gr.
Winchester grouped best at 32.5gr with .60" group, remington grouped best at 31.5gr with. 69" group, federal brass is where I started having problems, first shot with third group at 32gr had ruptured primer so I stopped there and rechecked the other brass and found the fifth shot from the first load done the same thing, puzzles me what would cause this weak brass maybe.
Also each box was shot on different days with a couple minutes between each shot, temperature was in the mid fourtyies.
I have picture but don't know how to post it, pin hole on outside edge of primers. Eny thoughts are appreciated.