It doesn't matter which you carry, its all about shot placement! Im sure that has already been said but I personally carry a 9mm. Do I like .45, of course I do, but again whether it be a 9mm, 45acp, .357 mag, etc its all about what your comfortable with and its ALL about shot placement. As OS said in the beginning of this, I too like the fact that its cheaper to shoot 9mm and IF a BO or SHTF situation ever occurred I personally believe it would be easier to my hands on 9mm than .45 I mean where have we all been where they DIDNT sell 9mm cause ive been to Wally World several times and them be out of 45 when I needed it. Just my .02