Its about .355 thousandths of an inch, roughly 36 caliber.
One would think it would be closer to 38 caliber (.38 hundredths of an inch) but that might refer to the diameter of the brass case the holds the bullet.
In other parts of the world, .380 is called 9mm Short. Even the revolver round .38 Special is actually 357 thousands of an inch, not 38.
.380 1903
.355 bullet diameter
No. Ammo designated as .38 or .38 special is different than ammo designated as .380. .380 is designed for semi-auto handguns and .38 ammo is for revolvers.More to the point, the .38 Special has a longer case, and a larger diameter projectile. The .38 special bullet measures .357" diameter, the .380 measures .355" diameter. The .38 special is a 'rimmed' cartridge, and the .380 is 'rimless'. Luckily, .38 Special ammo will not fit in a .380 magazine, otherwise the results could be disastrous, possibly turning your .380 handgun into a hand grenade.
Yes. 9mm Kurz (or Cortos) is the European designation for .380 ACP. also called .380 Auto.
.355
Two different sizes. .32 is .320 inches in diameter, .380 is, well, .380. There are different .32 cartridges for revolvers and automatic pistols, the .380 is for automatic pistols. The .380 also has more power than a .32 auto.
Yup.
.355 inches.
They are the same round. In the "metric world" outside the US it's called 9mm Kurz (German for "short") and in the US it's called the .380 ACP. Other names, depending on the country and manufacturer, include .380 Auto, 9mm Browning, 9mm Corto, 9mm Short and 9x17mm, and there are even some others. The confusion is caused by the fact that US ammo named .38 or .380 is the diameter of the brass cartridge while the bullet is actually .35" (9mm) diameter.
.380 ACP means .380 Caliber, Automatic Colt Pistol. Often shortened to 380 auto. In other parts of the world, the 380 ACP is called a "9mm short" (or Kurtz, Corto other languages for "short."). So yes.
None, the projectile diameter is the same for both - .355. If you are asking about a complete round of ammunition, the 9mm case is 19mm long and the 380 case is 17 mm long. This cartridge is called the ".380 Auto" for use with an automatic pistol. However, the most common 9mm round is the "9mm Lugar". This cartridge has a heavier bullet and a longer case, thus a larger muzzle velocity and energy than the .380 Auto.
.380 refers to the diameter of the bullet fired- and to the type of cartridge used by the gun.