Im beting far more have been lost to gut shots, seen many myself. I do bet the ones that where shot in the head where far more a disturbing site to see though. I last week saw one run for 400 hundred yards tripping over his guts, I guided a friend on a hunt. He shot him 8 inches behind the front shoulder. , but alas, I did not have my trusty Armalite. My friend had to kill him with my .45 , after we found him.
Softpoints work well. Just dont use Match ammo, not very nice. Almost zero expansion.
As Lycanthrope said, Know your shot. I would'nt even try a head shot if i couldnt hit a target the size of a tennis ball 10 out of 10 at 100 yards. Tennis balls are cool!!! AND no!, I dont shot my AR-30 offhand. That'd be dumb.