The .40 caliber fires a larger, more powerful cartridge than the 9mm. which is about .35 caliber.
Minor additional info: Many models of pistols that are available in 9mm or .40 are otherwise the same, except for caliber. For instance, a Glock 19 and a Glock 23 are the same exact guns, but the 19 is a 9mm and the 23 is a 40...the 23 holds 2 less rounds.
9mm = .355 40 cal = .40
9mm will have the least kick, follwed by the 40, then the 357.
uuhhh... no, you cannot fire a 9mm parabellum through a .40 s&w.9mm converted to inches is .35 now you see that .40 is a little wider.
The caliber for one.
The .357 Sig is a 9mm projectile, loaded into a necked down .40 S&W casing.
The .40 is a larger diameter round. The projectile has a dimension of .4005, versus the 9mm Parabellum, which has a dimension of .356. Of the two, the .40 is the more powerful cartridge.
Short answer, a 9mm is smaller in diameter and lighter.
He got shot with a 9mm semi - automatic pistol
There isn't a .40 ACP - the cartridge you're thinking is the .40 S&W. Basically, it's a larger cartridge than the 9mm, being essentially a shortened version of the 10mm auto cartridge.
.355 vs .40
Depends on the caliber and the magazine. You can have up to 20 in 9mm and up to 12 in 40 S&W with factory magazines.
The 9mm Lugar round is longer than a .380 Caliber, which is also equal to 9mm in diameter. The overall cartridge and the bullet is larger and the case contains more powder. The 9mm Lugar is more powerful. BTW, the .40 cal Smith and Wesson is also called a 10mm. It is only 1mm larger in diameter and a little more powerful than a 9mm Lugar.