A 9mm hollowpoint, 147 grain shot will have plenty of stopping power. Unless the perp is hyped up on something hardcore, that will stop anyone in their tracks. If you are worried about it though, just get a damn 12g shotgun.

"Moore has also accused the American people of being the stupidest, most naive people on the face of the Earth. And after last weekend, he's got the box office numbers to prove it!"