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While modern firearms are generally referred to by the name of the cartridge the gun is chambered for, they are still categorized together based on bore diameter. [citation needed] For example, a firearm might be described as a "30 caliber rifle", which could accommodate any of a wide range of cartridges using a roughly 0.30 inches (7.6 mm) projectile; or as a "22 rimfire", referring to any ...
The gauge (in American English or more commonly referred to as bore in British English) of a firearm is a unit of measurement used to express the inner diameter (bore diameter) and other necessary parameters to define in general a smoothbore barrel (compare to caliber, which defines a barrel with rifling and its cartridge).
The British standard ordnance weights and measurements for the artillery were established by the Master General of Ordnance in 1764, and these were not altered until 1919, [citation needed] when the metric system was additionally introduced.
The 15 cm guns would have a caliber of 14.91 cm and would come in a two 25 caliber versions, a 30 caliber version, and a 35 caliber long version. [21] However, the first 15 cm L/30 gun that Krupp actually made had a caliber of 152.4 mm (i.e. 6"). Its consistent name could have been 15 cm MRK L/30.
12 cm kan M/94 (Bofors 12 cm naval gun L/45 model 1894) Sweden-Norway: 1890s - Cold War 120 mm (4.7 in) 12 cm kan M/11 (Bofors 12 cm naval gun L/45 model 1911) Sweden: World War I - Cold War 120 mm (4.7 in) 12 cm kan M/24 (Bofors 12 cm naval gun L/45 model 1924) Sweden: Interwar - Cold War 120 mm (4.7 in) Bofors 120 mm Automatic Gun L/50
This is a list of firearm cartridges that have bullets in the 9 millimeters (0.35 in) to 9.99 millimeters (0.393 in) caliber range. Case length refers to the round case length. OAL refers to the overall length of the loaded round. All measurements are given in millimeters, followed by the equivalent in inches between parentheses.
Many pistol cartridges are in this caliber; the most common are: 7.62×25mm Tokarev, also known as 7.62 mm TT, is used in the Tokarev pistol, and many of the World War II Soviet submachine guns; 7.63×25mm Mauser, which was the basis for, and has nearly identical dimensions to, the Tokarev, but has different loading specifications.
For example, the service life of a squeeze bore 7.5 cm Pak 41 could be as low as 1000 rounds compared to 5000-7000 rounds for the 7.5 cm Pak 39 (L/48). [3] The diameter of a fired shell could decrease as much as 40% from .50 caliber to .30 caliber (achieved in a version of the M2 machine gun).