Well... I know my bone terminology...some of it anyway..
(That's not a misprint.) He was up a tree pretty well, so shooting off from "sticks" I guess. He shot twice and the animal was hit in the neck (grazed) and had two broken hinds. He was still full of spunk when I approached so I put one center-mass, broadside, when he raised his front end up - I thought he was going for it, not realizing he was broke up already. I gave my buddy a box of ammo over 10 years ago; it was an MTM box so 50 holes, but It probably wasn't filled all the way. He needed to buy ammo last year.
I'm pretty sure won't wear out his rifle.
I imagine he probably isn't a crackshot but I wouldn't be surprised if the "femur-breaker" also killed a sapling or two prior.
(Both femurs were broken near their lower ends, right above the joint, so mostly just bone and skin involved, very little muscle. Even so, a pretty good showing for a cup-n-core bullet.)