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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 ...
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).
However, making cases from existing .223 Remington brass is as simple as running the case through a 6×45mm die. The availability of .223 cases, the ease of forming, and the light powder charge make for a very affordable shooting cartridge.
The dimensions of the basic case are: Rim diameter (at base): .535 in. (13.59 mm) Outside diameter (at base): .555 in. (14.10 mm) Inside diameter (of case): .538 in. (13.67 mm) Maximum case length: 2.10 in. (53.34 mm) The WSM family of cartridges are Delta L problem cartridges, meaning they can present unexpected chambering and/or feeding problems.
Bill Wylde of Greenup, Illinois, compared the two cartridges and changed the chamber of the rifle's barrel to a specification he called the .223 Wylde chamber. The chamber is made with the external dimensions and leade angle found in the military 5.56×45mm NATO cartridge and the 0.2240 in (5.69 mm) freebore diameter found in the civilian SAAMI .
Many of the popular 7.62x39 cases are made from steel, which will not work for reforming the shoulder. 277 Wolverine, Standard military 5.56x45 case (also .223), shoulder is reformed lower, length is trimmed, neck is sized to .277 6.8 SPC (.277), Proprietary. Developed as an all new cartridge in the hopes of gaining a military contract.
WSM and WSSM family of cartridges. From left to right: .223 WSSM, .243 WSSM, .25 WSSM, .270 WSM, 7 mm WSM, .300 WSM, .325 WSM. Winchester Super Short Magnum, or WSSM is a line of rebated bottlenecked centerfire short magnum cartridges introduced by the U.S. Repeating Arms Company (Winchester Inc). [1]
Parent case.223 Remington: Case type: Rimless, bottleneck: Bullet diameter.172 in (4.4 mm) ... The .17-223 / 4.4x45mm is a centerfire wildcat rifle cartridge.