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The .223 Remington (designated 223 Remington by SAAMI [4] and 223 Rem. by the C.I.P. [5], pronounced "two-twenty three") 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 ...
For example, the .223 Remington cartridge, when loaded for use in the AR-15 rifle (or the military's M16 rifle), has to fit into the removable box magazine for that rifle. This dictates that the cartridge's maximum overall length be no greater than 2.260".
.223 Remington – Original AR-15 cartridge: .223 cartridges may function in a 5.56×45mm rifle, however 5.56×45mm cartridges may produce excessive pressure in a .223 Rem rifle. On the other hand, a .223 Wylde chamber is used on .223 Rem rifle barrels to allow them to safely fire either .223 Remington or 5.56×45mm NATO ammunition. [6]
The major dimensional difference between the chambers that fire the .223 Remington and the 5.56×45mm NATO is the longer and larger-diameter "freebore" [3] in the 5.56 chamber (0.0566 in (1.44 mm) vs 0.0250 in (0.64 mm) length, 0.2265 in (5.75 mm) vs 0.2240 in (5.69 mm) diameter). Freebore is a short and smooth section of the barrel that is ...
Mini-action cartridges, are usually intermediate rifle cartridges, with a COL of 57 mm (2.25 in) or shorter in length, which is most commonly exemplified by the .223 Remington; Short-action cartridges, are usually full-powered rifle cartridges with a COL between 57 and 71 mm (2.25 and 2.8 in), which is most commonly exemplified by the .308 ...
.22 Nosler, a cartridge introduced in 2017 intended for use in AR-15-style rifles.22 PPC, a firearm cartridge used primarily in benchrest shooting.22 Remington Jet, a cartridge designed for the Smith & Wesson Model 53 revolver.22 Savage Hi-Power (5.6×52mmR), a cartridge introduced by Savage in 1912 for use in the Savage Model 99 rifle
The 6×45mm cartridge provides better down range performance than the .223 Remington or the 5.56 NATO cartridges. The cartridge is currently offered by Les Baer in an AR rifle. The cartridge had been offered by Cooper Arms, Kimber and a few other rifle manufacturers in their rifles as a regular factory chambering for a period of time. [3]
The .223 WSSM was introduced in 2003 by the Browning Arms Company, Winchester Ammunition, and Winchester Repeating Arms Company. The .223 designation is a reference to the popular .223 Remington. It is currently the fastest production .22 caliber round in the world with muzzle velocities as high as 4,600 feet per second (1,402 meters per second).