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The length of the barrel (especially for larger guns) is often quoted in multiples of the caliber, used, for example, in US naval rifles 3 in (76 mm) or larger. [2] The effective length of the barrel (from breech to muzzle) is divided by the barrel diameter to give a dimensionless quantity.
In this case they tested a wide variety of ammunition available in .38 and .357 magnum using a single revolver modified to have a long barrel (so that they could cut it down an inch at a time, as they did with the barrel length tests) and also modified to allow them to change the gap using a set of shims. In this way they were able to test with ...
Another difference between the C-9 and C-9 Comp. is the barrel length. Its 4 in (102 mm) barrel is 1 ⁄ 2 in (12.7 mm) longer than its sister weapon's providing for better accuracy and balance. The compensator and extra bulk also increase the weight. Weighing in at 35 oz (992 g), it is 6 oz (170 g) heavier than the new model, and 2 oz (57 g ...
The COP .357 is an American 4-shot Derringer-type pistol chambered for .357 Magnum. The double-action weapon is about twice as wide and substantially heavier than the typical .25 automatic pistol , though its relatively compact size and powerful cartridge made it an option for a defensive weapon or a police backup gun.
The barrel is manufactured with polygonal rifling, which is reported to improve accuracy and durability, and is much more expensive to produce. [12] [14] It also features an ambidextrous safety and magazine release on both sides of the frame. The magazine release is at the rear edge of the trigger guard, which is wide enough to allow the use of ...
After the proof test and if successful, two or three proof marks are always applied to the main (highly stressed) parts of the arm, namely the barrel, the chamber (when not part of the barrel) and the locking mechanism. These 3 essential parts are also weighed and their weight is recorded in a database together with the serial number.
For example, a 4-inch gun of 50 calibers would have a barrel 4 in × 50 = 200 in long (written as 4" L/50 or 4"/50). A 16-inch gun of 50 calibers (16" L/50) has a barrel length of 50 × 16 = 800 inches (66 ft 8 in). Both 14-in and 16-in navy guns were common in World War II.
The first variant, the Officer's Model Target appeared in 1904 as a Premium model more focused on sport shooting than on common use, it was produced in 7.94 mm (.32) and 9 mm (.38) calibers, with barrels whose lengths ranged from 4 in (101.6 mm) to 7.5 in (190.5 mm), with 6 in (152.4 mm) being the most common.