This is not new to the argument old guys know that a high velocity round may very well explode on impact and not penetrate at all. Particularly if it hits something hard like bone.

I have it in 45LC/410 and it is a hand full but fun on milk jug don't think the 10mm is heavier than that and the barrel will have more steel too

SC I have a 72 351 Cleveland with 4V heads in a Ranchero
In California but but that is another story