I have a friend who was loading a 6mm remington 700 rifle up to the MAX (and beyond as far as I was concerned).
this was his praire dog rifle.
He had to use a rubber mallet to open the bolt each time he fired!!!
One time, he hit the bolt handle and it came OFF of the bolt (it was silver soldered on apparently).
So, he took the rifle to a custom gunsmith he uses, and the bolt and action in that rifle were destroyed. The metal had turned extremely granular (looked like a bunch of small bee bees).
Only salvageable part was the stock.
I was shooting a 243 with a 75 grain bullet (because that was all that was available at the time.........NOT my first choice....but it worked quite well even with the crappy ballistic coef)
It came out at 3030 FPS. He mocked me and said I needed to crank it up to 3600 or so. I laughed and said, I don't want to work the rifle, or my shoulder hard and besides, the prairie doesn't notice if he died a millisecond sooner or later anyhow.