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Therefore with a 12-gauge, it would take 12 balls of lead of the same size as the 12 gauge shotgun's inner bore diameter to weigh 1 pound (453.6 g). [5] The term is related to the measurement of cannons , which were also measured by the weight of their iron round shot ; an eight-pounder would fire an 8-pound (3.6 kg) ball.
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).
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.
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 ...
Common 12 gauge slug masses are 7 ⁄ 8 oz ((383 gr (24.8 g)), 1 oz ((437.5 gr (28.35 g)), and 1 + 1 ⁄ 8 oz ((492 gr (31.9 g)), the same as common birdshot payloads. Depending on the specific stack-up, a card wad is also sometimes located between the slug and the shotshell wad, depending largely on which hull is specified, with the primary ...
12 gauge 20 gauge Italy: 1989 Benelli M1014: Benelli Armi: 12 gauge Italy: 1999 Benelli Nova: Benelli Armi: 12 gauge 20 gauge Italy: 1999 Benelli Raffaello: Benelli Armi: 12 gauge Italy: 1990 Benelli Supernova: Benelli Armi: 12 gauge Italy: 2006 Benelli Vinci: Benelli Armi: 12 gauge Italy: 2009 Beretta 682: Fabbrica d'Armi Pietro Beretta: 12 ...
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The short, fat, unaerodynamic Foster slug was no longer needed for its inherent stability; new slugs were smaller in diameter, usually around 10.16 to 12.7 millimeters (.40 to .50 caliber) (compared to the 18.5 millimeter (.73 inch) bore diameter of a 12 gauge), and carried in a plastic sabot.