The only anecdotal data I have on the .40 S&W was when a deer was hit by a car and one of our Sgts has to put it down. It was a mesium sized doe and he fired his issue Glock .40 directly into the back of its head from about 3 ft away and the bullet ricocheted off the skull....twice. He then used a knife to the throat.
Holy crap.
That is what he said plus a few other colorful words directed at the round and the people that chose it! I picked up the deer for the meat and we did a necropsy on it. There were two dents in the skull about an inch apart inline between the ears. We cut off the back of the skull and it looked like a normal skull. Couldn’t recover the bullet to find out if they were to blame.
