I thought I would relay an experience that recently happened to a friend of mine and the resulting discussion that ensued. He is a self employed plumber and was called out on a late night job in a bad area of town. While stopped at an intersection this guy appears out of nowhere and is right at the drivers side window of my friend's truck. My friend had his KelTec 9mm on the seat next to him and promptly points it at the guy with the admonition to get away at once. The guy immediately throws his hands up in the air, obviously scared silly, and takes off running. The point of this is, as we discussed, the fact that my friend had a gun was all that mattered. The guy didn't stop to determine the caliber or type of gun to decide whether it was powerful enough to really hurt him, he just wanted out of there. Our conclusion was that any gun pointed at someone is usually sufficient to stop the threat. Most people don't want to be shot by anything, plain and simple. It could have been a .22 or a .44, it really didn't make a difference. Now obviously when you have to fire the weapon in self defense, caliber can be very important but this is just one example of where having "A" gun is all that matters.