which gun is better 9mm or 40 caliber

which gun is better 9mm or 40 caliber. There are some references to which gun is better 9mm or 40 caliber in this article. If you are looking for which gun is better 9mm or 40 caliber you've came to the right place. We have posts about which gun is better 9mm or 40 caliber. You can check it out below.