I've come up with a theory on why 9mm beats .40 SW and .45 ACP. The theory states that 9mm is more readily available world wide since it is NATO, so if WW3 or the Zombie Apocalypse ever happened, there would be more 9mm ammo circulating around and easier to get your hands on.
Now this made me think about the .40 SW and made me wonder if it is used in other countries....I always believed it was just a police round used exclusively in the US, but maybe you can tell me,is the .40 SW cartridge used in other countries? or just the US?
Much thanks
-Indy