308/150 TTSX from elk. 70 yards (or a bit less) 2,730 FPS mv. Hit nothing prior to the elk, pinched closed on contact, tumbled, found backwards offside. I’d wager they fail more than every other cup and core bullet combined x 10.
“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery