When the pressure builds up high enough to overcome the crimp friction between the projectile and the case, the projectile separates from the case and gets propelled down the gun barrel, imparting high kinetic energy from the propellant gases and accelerating the projectile to its muzzle velocity. The projectile motion driven by the propellant inside the gun is known as the internal ballistics.
Također, prije početka građevinskih radova koji mogu uticati na unutrašnju gasnu instalaciju i njen siguran pogon potrebno je da ugovorni izvođač, operater mreže ili preduzeće za kontrolu sistema za odvod produkata sagorijevanja u okviru svoje nadležnosti utvrdi da planirani radovi nemaju nikakvog štetnog uticaja na gasne instalacije.
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The case shape is meant to match exactly to the chamber of the gun that fires it, and the "neck", "shoulder", and "body" of a bottleneck cartridge have corresponding counterparts in the chamber known as the "chamber neck", "chamber shoulder", and "chamber body".
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Many malfunctions occur during this process, either through a failure to extract a case properly from the chamber or by allowing the extracted case to jam the action. Nineteenth-century inventors were reluctant to accept this added complication and experimented with a variety of caseless or self-consuming cartridges before finally accepting that the advantages of brass cases far outweighed this one drawback.[30]
The oito mm Lebel ammunition, developed in 1886, was the first smokeless gunpowder cartridge to be created and adopted by any country. Most of the early all-metallic cartridges were of the pinfire and rimfire types.
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Some cartridges, like the .470 Capstick, have what is known as a "ghost shoulder" which has a very slightly protruding shoulder, and can be viewed as a something between a bottleneck and straight-walled case. A ghost shoulder, rather than a continuous taper on the case wall, helps the cartridge to line up concentrically with the bore axis, contributing to accuracy. The front opening of the case neck, which receives and fastens the bullet via crimping, is known as the case mouth.
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The brass needs to be annealed to remove the work-hardening in the material and make the brass malleable again ready for the next series of dies.[14]
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The Hague Convention of 1899 bans the use of expanding projectiles against the military forces of other nations.