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A bullet with a diameter of approximately 9mm. Not all 9mm projectiles are exactly 9mm in diameter - the 9x19 Parabellum/Luger has a diameter of 9mm, while the 9x18 Makarov has a diameter of 9.27mm, the 9x23 Steyr has a diameter of 9.03mm, etc.
They use bullets of the same diameter, but with different weight ranges, which happen to overlap. The .380 uses a 9mm diameter bullet in a 17mm long case. The 9mm uses a 9mm diameter bullet in a 19mm long case.
I think you mean .32 caliber, not mm. It means that the gun fires a bullet that is about 32/100ths of an inch in diameter. A 9mm fires a bullet 9mm in diameter- or about .35 inches in diameter. A 32 mm bullet would be about the size of big (D cell) flashlight battery!
The 9mm round in loaded with a bullet diameter of .356"in.
9mm
380 and 9mm projectiles are .355 in diameter _________________________ Most of the time, when people use the term 9mm, they are referring to a 9mm parabellum. A 9mm parabellum cannot be fired from a .380. The 9mm cartridge is longer. _________________________ The BULLET is the part of the cartridge that is the projectile. While 9mm parabellum and .380 ACP use the same diameter bullets, the CARTRIDGES are not interchangeable.
Projectile diameter is the same. 9mm case length is longer.
The 9mm means that the bore is 9mm inside diameter . The bullet will be roughly 9mm or a little more in diameter. The 45 means basically the same, the bore of the barrel is .45 caliber. but the bullet will be anywhere from .451 to .452 in diameter depending on manufacture and on type of metal the bullet is made out of. So basically yes.
The diameter of the bullets
AP diameter of 9mm in the midline means the front-to-back distance in the middle of the structure is less than a half inch.
Diameter = 2 x radius = 18 mm .
9mm and 380 both use bullets with a diameter of .355. But the answer to the question you're probably asking is, no, you cannot fire a 9mm parabellum cartridge from a .380 handgun. The 9mm cartridge is different than the .380 cartridge. Even though both are 9mm in diameter, the overall cartridge lengths are different.