I've seen it personally with gun shot wounds. One in particular was with a 45 and it blew a canal though a guy's calf.
I am sure you have. This is for the same reason those "meat targets" often look so ravaged, but when you shoot the same round into something like a full sized hog or human chest cavity, things look very different, much more subdued, sort of like the difference between shooting a 12 oz can of water versus shooting a 55 gallon drum of water. The smaller targets are much more dynamic.
I have shot living hogs with the same bullets that blew 5" holes in "meat targets" only to have it punch a 1/2"-3/4" max width permanent wound channel through the hogs.
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Y'all are talking about experienced expert instruction. Can y'all remember when it was cool to have a shooting instructor that "had seen the white elephant." Yep, 1 event was enough to be an 'experienced' gun fighter, not 100 gunfights, not 75 or 50, not 30, 20, 10, or 5, but 1 and you had seen that proverbial white elephant.
Most of the experts with high gun battle counts that are into double digits or even possibly triple digits likely did not get that experience in typical civilian self defense shootings. Chances are that they were in full battle rattle with a team of fellow combatants using rules of engagement unlike what any normal civilian would use.
I don't know about y'all, but just because I have had some instruction and managed to fix some plumbing leaks doesn't make me an experienced plumber, despite have some experience plumbing. I have been in class with more people who have been involved in non-military/leo self defense shootings than instructors who have been in non-military/leo self defense shootings.