TexasCHLforum.com

The article makes a few excellent points without getting bogged down in the caliber debates:

A gun is better than no gun.

The ability to perform with accuracy and speed is just as important with a small gun as a larger one. There are no handicaps awarded for tiny sights, pulled shots, or slow shooting in a gunfight.

No matter what you carry, you need to be able to use it to effectively stop somebody who's working as hard and fast as he can to kill you. In that 3 second encounter, there won't be any second place winners.