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Gauge was determined from the weight of a solid sphere of lead that will fit the bore of the firearm and is expressed as the multiplicative inverse of the sphere's weight as a fraction of a pound, e.g., a one-twelfth pound lead ball fits a 12-gauge bore. Therefore with a 12-gauge, it would take 12 balls of lead of the same size as the 12 gauge ...
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).
The shotgun is available with 12/76mm or 12/89mm chambers and either 610, 650, 710 or 750 mm barrels. The MP-153 is manufactured with fixed choke available as Cylinder, Modified or Full variants, or with screw in chokes with Cylinder, Improved Cylinder, Modified, Improved Modified, Full and Extra Full variants available.
Remington Arms Company: 12 gauge United States: 1908 Remington Model 11: Remington Arms Company: 12 gauge 16 gauge 20 gauge United States: 1898 Remington Model 11-48: Remington Arms Company: 12 gauge 16 gauge 20 gauge 28 gauge.410 bore United States: 1948 Remington Model 11-87: Remington Arms Company: 12 gauge 20 gauge United States: 1987 ...
It is chambered in 12 gauge with a 28-inch barrel, or in 20 gauge or .410 bore with a 26-inch barrel. It weighs 6 + 1 / 2 pounds. An upgraded version of the SPR100 has a nickel-plated receiver, walnut stock and fore-end, and screw-in choke tubes. This variant is a 12 gauge with a 29 + 1 / 2 -inch barrel.
The choke typically consists of a conical section that smoothly tapers from the bore diameter down to the choke diameter, followed by a cylindrical section of the choke diameter. Briley Manufacturing, a maker of interchangeable shotgun chokes, uses a conical portion about three times the bore diameter in length, so the shot is gradually ...
Vent rib, Rem Choke Pump shotgun with camo coverage. [15] Wingmaster 12-gauge (2 + 3 ⁄ 4" and 3"), 20-gauge, and .410-bore 25–28 in (640–710 mm) Vent Rib, Rem Choke Satin finish on stock and fore-end. American walnut woodwork. Receiver and barrel are polished blue. [16] Fieldmaster Fully Rifled Cantilever 12-gauge 20 in (510 mm) Fully rifled
The Model 11-87 is a gas operated semi-automatic shotgun.Upon firing a shell, some of the high-pressure gases from the burning propellant are diverted through two small holes under the barrel, [2] forcing the bolt toward the buttstock, which in turn ejects the spent shell.