So far for this test, I've fired close to 200 loads including all the fire forming loads. The Nosler, & WW brass has held up well. The WW brass was new, the Nosler brass was fired maybe once fired, before fire forming. I'm not sure about the FC brass.
Most of the Remington brass has been fired a few times before in a 375, how many, I don't know but see the picture, I've had three such failures with this brass. I am annealing all the brass because of this and so that the brass will as good as possible for comparison. There was one failure on the neck of a FC brass too.

Attached Images
REm 375 failure.jpg (14.3 KB, 53 downloads)
FC 375 failure.jpg (11.65 KB, 38 downloads)
Last edited by Bugger; 01/03/21.

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally