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For example, a shotgun is called "12-gauge" because a lead sphere that just fits the inside diameter of the barrel weighs 1 ⁄ 12 pound (38 g). This measurement comes from the time when early cannons were designated in a similar manner—a "12 pounder" would be a cannon that fired a 12-pound (5.4 kg) cannonball; inversely, an individual "12 ...
A Fiocchi cal. 12 gauge. At that time a radical change was introduced in firearms: the newly developed breech-loader replaced the traditional muzzle loader. Fiocchi started manufacturing cases with primers suitable for reloading; in the early 1890s production was extended to complete cartridges loaded with bullets or shot. At the same time ...
Military use of combat shotguns through the 20th century has created a need for ammunition maximizing the combat effectiveness of such weapons within the limitations of international law. 12-gauge has been widely accepted as an appropriate bore diameter to provide an effective number of projectiles within an acceptable recoil. Early 12-gauge ...
Shotgun conversion sleeves may be called subgauge inserts, subgauge tubes, or gauge reducers. Sleeves intended for rifle or handgun cartridges may have rifled barrels. Additional variations may allow centerfire weapons to fire rimfire ammunition and/or retain autoloading function with the smaller cartridge.
The Baikal MP-153 is a 12 gauge gas-operated semi-automatic shotgun manufactured by Kalashnikov Concern (originally by the Izhevsk Mechanical Plant) in Russia. [1]The shotgun is available with 12/76mm or 12/89mm chambers and either 610, 650, 710 or 750 mm barrels.
The chamber was configured to accept the proprietary belted cartridges as well as commercial 12 gauge rounds and the barrel could be fitted with a choke or choked barrel extension. The carry handle covers the cocking handle similar to the AR-10 , and housed an optical sight which could be converted to a rail sight.
Shotguns intended for all-round hunting are a compromise, but a 72 to 74 cm (28–29 in) barrel pump-action 12-gauge shotgun with a modified choke can serve admirably for use as one gun intended for general all-round hunting of small-game such as quails, rabbits, pheasants, doves, and squirrels in semi-open wooded or farmland areas in many ...
For example, for a 12 gauge, the bore diameter of the barrel is nominally 18.5 mm (0.73 in), although different manufacturers do vary their as-manufactured bore from this diameter slightly. This is commonly called "overbore", when the as-built diameter exceeds the nominal actual diameter of 18.5 mm (0.73 in).