There are SEVERAL 9mm cartridges- the most common is probably the 9mm Parabellum (9mm Luger). A 9mm Parabellum BULLET (not cartridge) is typically slightly smaller than a .38 Special bullet- .356 instead of .357. The 9mm is frequently (not always) lighter- and shorter. Other 9mm cartridges (such as the 9mm Makarov) will have different bullets.
The .22 bullet is smaller than the 9mm in size, (about 6mm) and is lighter in weight.
The 380 ACP, also known as the 9mm Short, 9x17, 9mm Browning, 9mm Kurz and 9mm Corto uses a .355 diameter bullet. The 38 special uses a .357 diameter bullet. Additionally, the 380 ACP is designed for a semi-automatic and the .38 special is designed for a revolver.
As far as diameter, there is very little difference. A .357 is .358 in diameter and a 9mm is .356 in diameter.
Generally speaking, the .45 caliber bullet is larger in diameter and heavier than a 9mm bullet.
The 9mm round in loaded with a bullet diameter of .356"in.
Not muchThe diameter of a .38 special bullet is 0.358 inch, which is 9.09 mm. ALOT. the diameter isn't the only thing to consider. although the calibers are close the 9mm and 38 special are no where near each other. a 9mm is usually 9 x 19mm and is 115-124 grains and a 38 special is approx. 9.07 x 39mm near 160 grains and obviously packs more of a punch. fire a 9mm and then a 38 special and it will make sense.
Glock is a brand. 9mm is a caliber size. So, there is no difference between a 9mm glock and a 9mm of another brand as far as caliber size.
There are many 9mm cartridges. 9x21 is one of them. First number is the bullet diameter and the second is the case length.
Close, but no. A .38 Special fires a .357 inch diameter bullet, 9mm Parabellum fires a slightly smaller bullet, but with more force. The .38 is a rimmed revolver cartridge, and the 9mm is a rimless automatic pistol cartridge.
9mm= .355 45 ACP = .452
The .380 is a 9mm bullet. But, going with the assuming that you're comparing the .380 ACP (9x17mm) against the 9mm Luger/9mm Parabellum (9x19mm), the answer would be no.
Term is cartridge, not bullet (bullet is the projectile part of a cartridge). Depending on WHICH of the Umarex blanks, a 9mm parabellum cartridge is a fair match, but not exact. The blank guns were designed so that they can NOT chamber and/or fire live ammo.