As far as diameter, there is very little difference. A .357 is .358 in diameter and a 9mm is .356 in diameter.
The .22 caliber bullet is ABOUT .22 inches wide. A .32 bullet is about .32 inches wide. The bullet will also be heavier due to size.
The .22 bullet is smaller than the 9mm in size, (about 6mm) and is lighter in weight.
Size and amount of propellant
Size and relative power. A .40 caliber bullet is .40 of an inch and the entire cartridge is 28.8 millimeters long. A .50 caliber (handgun) bullet is .50 of an inch and the entire cartridge is 40.99 millimeters long. The .50 caliber has more powder, more velocity, and more muzzle energy.
The 22 is a very small bullet and the 38 is about 4 times larger. The pistols however may be about the same size but will be chambered accordingly.
It's a .30 caliber bullet. .30 caliber is the American designation for the size, 7.62 millimeters is the European designation.
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.
Its the size of the bullet that the gun is made for. its the caliber that a handgun uses
It is .25 caliber.
Caliber is the size designation for rifle and handgun bullets. Guage is the size designation for shotgun rounds.
38 is the size. This answer is actually correct, but more specifically, .38 special (and many of the other .38 caliber cartridges) are actually .357. The caliber ".38" was chosen to distinguish between .357 magnum and .38 special.
If you're talking about firearms, caliber refers to the diameter of the bullet or the bore size of of the gun.