I had a partial case head separation using a 1.8oz buffer

[LRRPF52]

I understand all of what you are saying. And none of it refutes the blowout failure model.

That tear or flap is much more likely to occur from the high pressure of a blowout as opposed to an early extraction which is definitely at a lower pressure by the time it happens.

I think it absolutely refutes the case failure model at peak pressure. That’s the whole point of what I’m saying.

Our first indicator of this was the intact extractor, but all the jumping to conclusions about Lapua brass derailed the thread.