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The external dimensional specifications of .223 Remington and 5.56×45mm NATO brass cases are nearly identical. The cases tend to have similar case capacity when measured (case capacities have been observed to vary by as much as 2.6 grains (0.17 ml)), although the shoulder profile and neck length are not the same and 5.56×45mm NATO 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.
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).
The cartridge maximum overall length is nominally given as 2.230-inch (56.6 mm), however, as the cartridge is a wildcat cartridge chamber dimensions may vary from manufacturer to manufacturer. For this reason overall length of the cartridge may vary.
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
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.
The .17 Remington is based on the .223 Remington case necked down to .172 in (4.37 mm), with the shoulder moved back. [5] [6]Extremely high initial velocity (over 4,000 ft/s 1,200 m/s), flat trajectory and very low recoil are the .17 Remington's primary attributes.
The .20 Tactical / 5.2x45mm is a wildcat centerfire rifle cartridge, based on the .223 Remington case, necked down to fire a 5.2 millimetres (0.204 in) caliber bullet. The .20 Tactical was designed by Todd Kindler and predates the .204 Ruger factory round. The case has approximately 0.2 grams (3 gr) less powder capacity than the popular .204 Ruger.