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An overview of 7mm caliber cartridges, their history, and uses in firearms.
It is half the size of the standard beer keg and equivalent to a quarter of a barrel. The term pony refers to its smaller size – compare pony glass (quarter-pint) and pony bottle. It will serve roughly 82 twelve-ounce cups. The shape of a pony keg resembles that of a full-sized keg while being much easier to move manually.
Textile fibers, threads, yarns and fabrics are measured in a multiplicity of units.. A fiber, a single filament of natural material, such as cotton, linen or wool, or artificial material such as nylon, polyester, metal or mineral fiber, or human-made cellulosic fibre like viscose, Modal, Lyocell or other rayon fiber is measured in terms of linear mass density, the weight of a given length of ...
The 6.8mm Remington Special Purpose Cartridge (6.8 SPC, 6.8 SPC II or 6.8×43mm) is a rimless bottlenecked intermediate rifle cartridge that was developed by Remington Arms in collaboration with members of the U.S. Army Marksmanship Unit and United States Special Operations Command [6] to possibly replace the 5.56 NATO cartridge in short barreled rifles (SBR) and carbines.
(E.g. 1 mm diameter wire is ≈18 AWG, 2 mm diameter wire is ≈12 AWG, and 4 mm diameter wire is ≈6 AWG.) This quadruples the cross-sectional area and conductance. A decrease of ten gauge numbers (E.g. from 24 AWG to 14 AWG) multiplies the area, weight, and conductance by approximately 10.
The 7.62×39mm (also called 7.62 Soviet, formerly .30 Russian Short) [5] round is a rimless bottlenecked intermediate cartridge of Soviet origin. The cartridge is widely used due to the global proliferation of the AK-47 rifle and related Kalashnikov-pattern rifles, the SKS semi-automatic rifle, and the RPD/RPK light machine guns.
George Stephenson introduced the 1,435 mm (4 ft 8 + 1 ⁄ 2 in) gauge (including a belated extra 1 ⁄ 2 in (13 mm) of free movement to reduce binding on curves [16]) for the Liverpool and Manchester Railway, authorised in 1826 and opened 30 September 1830. The extra half inch was not regarded at first as very significant, and some early trains ...
It is commercially loaded with 0.224-inch (5.7 mm) diameter jacketed bullets, with weights ranging from 35 to 85 grains (2.27 to 5.8 g), with the most common loading by far being 55 gr (3.6 g). Ninety-grain and 95-grain (6.2 g) Sierra Matchking bullets are available for reloaders.