There was a state cop here years ago who blew a guy in half with a 357mg with hollow points while the guy had an automatic weapon. Of course the crap hit the fan about hollow points then but they never said anything about being fired upon by a automatic weapon. :-D
I visited the godfather of my youngest son in the hospital the night this sheriff's deputy was shot in the upper arm with a 357 magnum.
The bad guy was in custody after the deptuty's dog disarmed the guy and the duputy put his gun to the guys head and then cuffed him.
What blew off a lot of muscle but didn't stop the deputy was a light 357 magnum the exploded on the surface and didn't penetrate.
Personally, I like really heavy 180 grain to 200 grain 357 Magnum bullets that will deliver "magnum velocity" but much more importantly real penetration.