Originally Posted by tiller
Im pretty sure its the primers... I use the standard copper wolf small rifle primers with the exact same load your using... Out of 2k rounds ive had about 30 do that.... And moisture is not an issue....
Try switching to tula... Ive used over 10k+ of those and never a problem with them!
Wolf and Tula are two different suppliers selling the same primers manufactured in the same Russian factory.