Very interesting--thank you!
Recovering bullets is something I always try to do---just to see what I can learn. I don't always succeed and even less often find what I expected to find
I recently mentioned that I have never recovered a bullet from my 7 mm Rem Mag. Twice I thought I had succeed, the first was on a caribou that I hit in the right front shoulder at about 200 yards. I managed to roll him over and didn't see an exit wound---that got revised when I started to skin him out. The bullet had hit the shoulder blade on the left front leg. The bone was shattered, but it had turned the direction of the, bullet which went back through the body and exited just in front of the left rear leg. The other was on a bull moose that I hit low in the chest (I was far below him). There was no exit wound (the entry wound was not easy to find either). It turned out the bullet went up and into the spine where it apparently blew up---so maybe you could call that a recovery--but nothing to see.
I have seen some interesting ones that I have recovered--two of the most interesting: A Nosler partition 308 from a wild boar. It failed to perform as intended. The jacket opened up completely and no lead was retained. The second, a 220 gr Sierra from a 35 Rem. I was forced to take a "Texas heart shot" on a white tail buck. He went about 50 yards and dropped. The bullet bulged out the hide on his chest---it had traveled completely through the animal---from you know where.
The bullet was a classic mushroom---I think for two main reasons--low velocity and it never hit a bone.
"A pessimist sees the difficulty in every opportunity, an optimist sees the opportunity in every difficulty” ---Sir Winston Churchill
"Political extremism involves two prime ingredients: an excessively simple diagnosis of the world's ills, and a conviction that there are identifiable villains back of it all." ---John W. Gardner
“You can’t go back and change the beginning, but you can start where you are and change the ending.” ---C. S. Lewis