I knew a dim-bulb in 'Nam who decided to shoot an elephant with his M16. (Not a friend, I had no influence over him, and I wasn't there when it happened. He told me the story after the fact. So save the PETA crap.)
Anyway, he was out on patrol and for some reason he decided he needed to shoot this elephant.
The first shot got the elephant's attention. The second got the elephant really pi$$ed-off. There wasn't a third shot because the elephant charged. Ben (the dim-bulb) said the only thing that saved his life was falling into a honey-pit (open cess-pool) at a full run and staying in it until the elephant lost interest in trying to find him.
The moral to this story: Never shoot an elephant with a .223 unless you are truly suicidal (or want to explore the depths of a honey pit). A rifle shot that may be fairly effective in taking out a 200-lb person is only an annoyance to an animal that may weigh 10,000 pounds. And that annoyance can run at 35 mph.