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In 1931, the V-770 design was built, derived from the Ranger 6-440 series of inverted inline air-cooled engines, and test flown in the Vought XSO2U-1 Scout. In 1938 it was tested in the Curtiss SO3C Seamew but was found to be unreliable with a tendency to overheat in low-speed flight, but would still be the most produced aircraft to have the V-770, with 795 being built.
The term belted magnum [1] [better source needed] or belted case refers to any cartridge, but generally a rifle cartridge, with a shell casing that has a pronounced "belt" around its base that continues 2–4 mm (0.079–0.157 in) past the extractor groove.
Headspace positioning of rimless, rimmed, belted and straight cartridges Several different rimmed, .22 rimfire cartridges, which have a uniform forward diameter, and which have headspace on the rim, allowing any length of cartridge shorter than the maximum size to be used in the same firearm Firearms chambered for tapered rimmed cartridges like this .303 British cannot safely fire shorter ...
Lack of a case also reduces the weight of the cartridge substantially, especially in small bore rifles. For example, the external-propellant caseless ammunition designed by Austrian inventor Hubert Usel (1926–2010) for the Voere VEC-91 weighs about one third as much as regular ammunition for the same caliber.
The modern metallic case can either be a "bottleneck" one, whose frontal portion near the end opening (known as the "case neck") has a noticeably smaller diameter than the main part of the case ("case body"), with a noticeably angled slope ("case shoulder") in between; or a "straight-walled" one, where there is no narrowed neck and the whole ...
A headstamp is the markings on the bottom of a cartridge case designed for a firearm.It usually tells who manufactured the case. If it is a civilian case it often also tells the caliber: if it is military, the year of manufacture is often added.
The legal dispute in United States v.Thompson-Center Arms Company arose when officials from the U.S. Bureau of Alcohol, Tobacco, and Firearms contacted Thompson Center Arms informing them that the kit of the Contender Pistol that included a stock and a 16-inch (410 mm) barrel constituted a short-barreled rifle under the National Firearms Act.
A headstamp is the marking on the bottom of a cartridge case designed for a firearm. It usually tells who manufactured the case. Military headstamps usually have only the year of manufacture . The left cartridge's headstamp says "FC 223 REM" which means that it was made by Federal Cartridge Co. and it is in the caliber .223 Remington. The ...