There is NO pressure signs on any of the other 19 rounds. The load is 72gr of Retumbo winchester mag primer 208amax. My quickload program shows 39851 for pressure which is very low. The guy i got it from ran 78gr and jammed the bullet .010
Dude can you even read???? Read my post again and see where I loaded LESS than what the guy told me, a lot less too. I've been reloading over 25 years. Dumbass!
To naval person yes it was a Winchester primer
I bought this 300 win mag. Loaded below what the guy told me the load was and 19 rounds fired fine, then the last shot was this one. It was brand new Remington brass.
i bought a new stock that had never been used and did the same thing. I used marine tex and it blended in very well. I bought it second hand and thought it wasnt their problem so i did what i thought was best and it turned out fine. Good luck