I'm a new member and I do not want to start a cal war. I do however just want some opinions on what cal you carry and why? I carry a 45 ACP caliber and I have been getting the itch to switch to a smaller liter cal such as a 9mm. I have decided I do not like the 40 cal and am unsure about the 9mm as far as self defense, I would like to get some opinions on this subject. Remember now it's not a cal war. After many years of carrying 45"s they are just becoming heavier and the old hands are looking for something lighter.