Up to 9
4.5 cal (9mm) like most guns
any single or double action semi-automatic pistol listed as a 40 caliber pistol...............
The term "762" refers to a 7.62mm bullet. This is a common size for European guns and the AK-47. The 54 refers to the length of the round or the powder, I forget. Not sure exactly what bullet this describes but that is the diameter size (caliber) of the bullet.
It all depends on the gun and its specs like the guns velocity.
The typical rifle bullet was .303 inch caliber. The same round was used in most of the light machine guns.
They used .58 caliber minie bullet's, lead slugs, and Thud Cannon's.
In guns including firearms, caliber or calibre is the approximate diameter of the barrel and by extension the projectile used in it, measured in inches or millimetres. The 20mm caliber ammo is the biggest one in production.
Some AUG assault rifles can be modified to be smaller and fire a smaller caliber of bullet, but these are not true submachine guns.
a .32 acp caliber pistol round is also called a 7.65mm in the metric designation. But that doesn't fit the real-world measurements, because a .32 pistol bullet is really more like .30 or .31 caliber, and 7.8mm in metric measurements. The diameters of a 7.63 bullet and a .32 caliber bullet are similar, but that doesn't mean they're the same "caliber" or that they will fit the same guns. The 7.62 mm family of rifles are often called ".30 caliber" and they really are close to that, with the bullets either .308 or .311 diameter.
Caliber refers to the diameter of the bullet. A 50 caliber bullet is .50 of an inch (half an inch) in diameter. It's also used to refer to a gun that shoots a 50 caliber bullet. The problem with the word "caliber" is that it has two different and confusing meanings. In small arms, "caliber" usually refers to the diameter of the bullet, NOT the casing, and is measured in inches (i.e. .50 caliber is 50/100ths of an inch, or a half-inch). [Note: your original question should be ".50" caliber, not "50" caliber.] The biggest problem with this usage is that it's not exact - the most common .50 caliber bullet (the .50 BMG of the Browning .50-caliber Heavy Machinegun) is actually .510 inches at the widest point. The other use of the word caliber is the ratio of the barrel bore (inside) diameter to its length. For instance, the huge 16" guns on the US's Iowa-class battleships are properly classified as 16"/50-caliber guns, which means that the barrel length is 15 times the bore length; thus, the 16/50 is 800 inches long (66 feet, 8 inches). While this usage of caliber is most common for cannon (and not small arms), it nonetheless can be found in discussions of rifles.
9x19mm is a caliber of a popular pistol cartridge, also known as 9mm Luger and 9mm Parabellum. 9mm is the diameter of the bullet and 19mm is the length of the cartridge case.
No such thing. You can have small caliber but not low caliber.