Incredible... 3 pages of posts and no definitive answers. I hope this thread doesn't turn out the same way.
I carry a 9mm so even though multiple shots to the chest will eventually kill a person, it may not stop them quickly. I know nailing the spinal cord will incapacitate a person but that is not a very wide target, even with hollowpoints.
Oh well, I hope this type of knowledge never comes in handy. I guess I'll have to wing it if it comes down to it. Left nut sounds like a good start. God knows even getting flicked in the nads hurts like hell.