So... as anyone in the shooting community knows, there has been a long-standing debate about what caliber to use for a defensive handgun. Recently, a friend of mine sent me this article, which shows some interesting facts for the debate.
I've always told people to carry whatever they felt comfortable with. If you're fine with a pocket .22, and feel that will do what you need it to do, cool. If you feel you need a Smith .500, rock on with your bad self.
Me? There's always a .32 in my pocket. What's on my hip varies: my .45, or the .357, or even the Beretta 9mm. I'm certain any of them will preform well if needed.
Go read: what this man's study shows is something many have known for awhile. That there is no "magic bullet"