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The .223 Remington (designated 223 Remington by SAAMI [4] and 223 Rem. by the C.I.P. [5]) is a rimless, bottlenecked, centerfire intermediate cartridge.It was developed in 1957 by Remington Arms and Fairchild Industries for the U.S. Continental Army Command of the United States Army as part of a project to create a small-caliber, high-velocity firearm.
This cartridge, based on the parent .223 in/5.56 mm case necked up for .257 bullets, is SAAMI standardized. The company offers properly headstamped virgin brass, as well as remanufactured ammunition from once-fired military 5.56 brass.
2. Cartridge case, which holds all parts together; 3. Propellant, for example, gunpowder or cordite; 4. Rim, which provides the extractor on the firearm a place to grip the casing to remove it from the chamber once fired; 5. Primer, which ignites the propellant. A cartridge, [ 1][ 2] also known as a round, is a type of pre-assembled firearm ...
Thompson/Center Ugalde. The Thompson/Center Ugalde, or TCU family of wildcat cartridges, was developed by Wes Ugalde of Fallon, Nevada, by necking up .223 Remington brass to accept larger bullets. The cartridges were developed for the Thompson Center Arms Contender single shot pistol, and are widely used in handgun metallic silhouette ...
The 5.56×45mm NATO standard SS109/M855 cartridge was designed for maximum performance when fired from a 508 mm (20.0 in) long barrel, as was the original 5.56 mm M193 cartridge. Experiments with longer length barrels up to 610 mm (24.0 in) resulted in no improvement or a decrease in muzzle velocities for the SS109/M855 cartridge.
The first version produced for commercial sale by Colt was the SP1 model AR-15 Sporter in .223 Remington, with a 20-inch (51 cm) barrel and issued with five-round magazines. [21] Initial sales of the Colt AR-15 were slow, primarily due to its fixed sights and carry handle that made scopes difficult to mount and awkward to use. [ 81 ]
Caseless ammunition ( CL ), [ 1] or caseless cartridge, is a configuration of weapon-cartridge that eliminates the cartridge case that typically holds the primer, propellant and projectile together as a unit. Instead, the propellant and primer are fitted to the projectile in another way so that a cartridge case is not needed, for example inside ...
On the military headstamp the "SB" is at 12 o'clock and the "S" is at 6 o'clock. Sold to the Steyr-Werke A.G. of Vienna, Austria in 1922. SB / Schönebeck, P69 Sellier & Bellot – Schönebeck (1922–1945) – Schönebeck, Germany. The "SB" was at 12 o'clock and the text for Schönebeck occupied the lower half of the headstamp.