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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).
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 ...
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 ...
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 ...
Thus, a 10-gauge shotgun has a larger-diameter barrel than a 12-gauge shotgun, which has a larger-diameter barrel than a 20-gauge shotgun, and so forth. M35 .410 shotgun cartridges for M-6 survival gun w/.22 long rifle for comparison. The most popular shotgun gauge by far is 12-gauge.
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
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.