diameter of a tube or gun barrel

The diameter of a shell measured in fractions of an inch or millimeters.

This is the size of bullet for projectile being shot.

The measurement of the firearm bore size.

This is confusing to almost all new shooters. Basically, it is the diameter of the bullet, in inches. However, the name of the cartridge (like .357 magnum or .38 Special, which actually use bullets of the same diameter) does not necessarily denote the exact measurement of the bullet diameter.

The measurement across the bore of a gun. Usually it is the distance between the lands. American calibers are measured in hundredths of an inch, for example .45 caliber. European calibers are measured in millimeters, for example 9 mm.

Used to identify appropriate ammunition for a firearm.

1. A term used to designate the specific cartridge(s) for which a firearm is chambered. 2. Firearms: The approximate diameter of the circle formed by the tops of the lands of a rifled barrel, often expressed in hundreths of an inch (“.38 Caliber”) or millimeters (“7mm Caliber). 3. Ammunition: A numerical term included in a cartridge name to indicate a rough approximation of the bullet diameter.

The diameter of the bore.

The numerical value of an approximation of the bullet diameter in inches or millimeters.

The type and size of ammunition used by a given gun. It is usually the diameter of the bullet. Sort of. Most the time. Caliber can be very confusing; see this page for a more complete explanation.

Approximate bore or grove diameter expressed (in English) in decimals of an inch, otherwise in the metric system. Frequently compounded to indicate powder charge; to show date of adoption; to show case length; or to show proprietor or designer. e.g. .30-40 Krag, .30-06, 8x57mm, .375 Holland & Holland, or .257 Roberts.

In earlier times, "caliber" was used to refer to the diameter of the movement. Today, it is used synonymously with the movement itself.

A numerical term, without the decimal point, in a cartridge's name to indicate the nominal bullet diameter.

(1) The diameter of a bullet measured in inches ... e.g., a 0.355" caliber bullet. (2) Formal designation of a unique cartridge specification ... e.g., "9x19mm" or ".45 ACP" or "357SIG." Often, the caliber (designation) of a cartridge is not the same as the caliber (diameter) of the bullet used by that caliber (designation) ... e.g., a .38 Special cartridge uses a 0.357" caliber bullet.

The length of a gun divided by the diameter.

The distance around the inside of a gun barrel measured in thousands of an inch. Bullets are labeled by what caliber gun they fit.

The nominal diameter of a projectile of a rifled firearm or the diameter between lands in a rifled barrel. In this country, usually expressed in hundreds of an inch; in Great Britain in thousandths; in Europe and elsewhere in millimeters.

1.The internal diameter of a tube. 2. The character and capacity of a firm.

The term caliber or calibre designates the interior diameter of a tube or the exterior diameter of a wire or rod. It comes from the Italian calibro, itself from the Arabic qālib (قالب) and meaning mold; the Arabic word is, in turn, from the Greek word kālápous, meaning shoe last.

The dimensions of the watch. Caliber describes the size and configuration of the movement and can now indicate the shape, origin and constructor as well.

A term often used by Swiss watchmakers to denote a particular model type, such as Caliber 48 meaning model 48. More commonly, the term is used to indicate the movement's shape, layout, or size.

A watch movement.

Originally it indicated only the size of a movement (s.), but now this indication defines a specific movement type and shape (e.g. round caliber) and combines it with the constructor's name and identification number. Therefore the caliber identifies the movement.

Designates the size and/or construction of a movement so that it can be precisely identified, when ordering parts for example.