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For example, the lightest common .30-06 Springfield rifle bullet weighs 150 grains (0.34 oz (9.6 g)), while the lightest common 12 gauge shotgun slug weighs 7 ⁄ 8 oz (383 gr (24.8 g)). Slugs made of low-density material, such as rubber, are available as less than lethal specialty ammunition.
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-gauge" shot would in fact be a 1 ⁄ 12 pounder. Thus, a 10-gauge shotgun has a larger-diameter barrel than a 12-gauge shotgun, which has a larger ...
However, given the relatively low muzzle velocity of slug ammunition, typically around 500 m/s (about 1600 feet per second), and the blunt, poorly streamlined shape of typical slugs (which cause them to lose velocity very rapidly, compared to rifle bullets), a hunter must pay close attention to the ballistics of the particular ammunition used ...
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 ...
In this instance, heavier bullets are loaded in standard ammunition, which reduces muzzle velocity below the speed of sound. As an example, the very common 9×19mm Parabellum standard military round is a 7.5 g (116 gr) bullet at velocities typically around 360 m/s (1,200 ft/s).
28.4±0.1 g (437±1.54 gr) 12 gauge rifled lead slug at a velocity of 435±25 m/s; ... Only a single low velocity penetrating shot is required to reduce the v 0 value.
For example, the barrel of a 12-gauge shotgun is equal to the diameter of a 1/12 of a pound lead ball (0.729 in) and a 20-gauge can fit a 1/20 pound lead ball (0.615 in). Using this method, a .410 bore is equivalent to a (hypothetical) 67-gauge, instead of the incorrectly labeled 36 gauge (0.506) in Europe and South America. [14] [15]
The Clucas Method of Entry Hatton round is a 12-gauge, 3-inch (76 mm) magnum shell that uses a 43-gram (1.5 oz) frangible projectile, consisting of a high-density wax binder. [3] Firequest makes a 12 gauge 2 + 3 ⁄ 4-inch (70 mm) frangible slug named the door breaching cartridge. The slug consists of copper and tin powder. [citation needed]
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