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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 parameter to define in general a smoothbore barrel (in difference of caliber what define a barrel with rifling and there cartridge).
A caliber conversion device is a device which can be used to non-permanently alter a firearm to allow it to fire a different cartridge than the one it was originally designed to fire. The different cartridge must be smaller in some dimensions than the original design cartridge, and since smaller cartridges are usually cheaper, the device allows ...
32 gauge — .526 in (13.4 mm) 28 gauge — .550 in (14.0 mm) 24 gauge — .579 in (14.7 mm) 20 gauge — .615 in (15.6 mm) 16 gauge — .663 in (16.8 mm) 14 gauge — .693 in (17.6 mm) 12 gauge — .729 in (18.5 mm) 10 bore — .775 in (19.7 mm) 8 bore — .835 in (21.2 mm) 6 bore — .919 in (23.3 mm) 4 bore — 1.052 in (26.7 mm)
A numerically larger gauge indicates a smaller barrel: a 20-gauge (15.6 mm) shotgun requires more spheres to equal a pound; therefore, its barrel is smaller than the 12-gauge. This metric is used in Russia as "caliber number": e.g., "shotgun of the 12 caliber." The 16th caliber is known as "lordly" (Russian: барский).
This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load (e.g. the highest muzzle energy might not be in the same load as the highest muzzle velocity, since the bullet weights can differ between loads).
Toggle the table of contents. List of cartridges by caliber. 2 languages. Norsk bokmål; ... 13 mm (.511+ caliber) See also. Table of handgun and rifle cartridges;
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Conversion from imperial to metric. Conversion from kilo grain feet per second to newton-seconds is trivial, since both the grain and foot is based on SI units. One troy grain is defined as 0.064 798 91 grams exactly [1] and one international foot is defined as 0.3048 meters, giving the exact conversion factor of 0.019 750 707 768. [2]