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Some machine gun and autocannon cartridges (such as the MG 131 13mm and M61 Vulcan 20mm) utilize an internal electric primer that contains chemicals activated by an externally provided electric charge, as opposed to a mechanical impact. The primer in turn ignites the main propellant, just as with a shock-sensitive or external electric type.
CCI (Cascade Cartridge Inc.), based in Lewiston, Idaho, manufactures rimfire ammunition, centerfire handgun ammunition, and primers for reloaders and industrial ammunition production. CCI made the first mini-mag rimfire ammunition in 1963, and in 1975 developed the Stinger, a high velocity .22 Long Rifle product.
Removing the spent primer from (decapping) these cases requires the use of a special tool because the primer anvil (on which the primer compound is crushed) is an integral part of the case and the case, therefore, does not have a central hole through which a decapping tool can push the primer out from the inside, as is done with Boxer primers.
The striker of the gun strikes the cap and fires the mixture. For larger guns an electric primer is used, the internal construction and action of which are precisely similar to the wireless tube already described; the exterior is screwed for the case. For percussion firing an ordinary percussion tube is placed in an adapter screwed into the case.
Initially, CCI made centerfire primers for government use. As of March 2015, it mainly manufactures rimfire ammunition but also makes centerfire handgun ammunition, primers for reloading and industrial purposes, and shotgun shells. CCI was founded in 1951 by Dick Speer, brother of Speer Bullets founder Vernon Speer.
A physical difference between pistol and rifle primers is the thickness of the primer's case; since pistol cartridges usually operate at lower pressure levels than most rifles, their primer cups are thinner, softer, and easier to ignite, while rifle primers are thicker and stronger, requiring a harder impact from the firing pin. [16]
The .410 started off in the United Kingdom as a garden gun along with the .360 and the No. 3 bore (9 mm) rimfire, No. 2 bore (7 mm) rimfire, and No. 1 bore (6 mm) rimfire. .410 shells have similar base dimensions to the .45 Colt cartridge, allowing many single-shot firearms, as well as derringers and revolvers chambered in that caliber, to fire ...
A rimfire firing pin produces a notch at the edge of the case; a centerfire pin produces a depression in the center of the primer. Rimfire ammunition is so named because the firing pin strikes and crushes the base's rim to ignite the primer. The rim of such a cartridge is essentially an expanded and flattened end section of the case, and the ...
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