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It also has the fastest rifling twist ratio for the .223 Remington of the three models(1:9 instead of 1:12). Early production rifles had a 1:12 twist rate and post-2014 rifles have the 1:9 twist rate. [3] The CZ 527 Varmint in .223 has muzzle velocities for standard-load 45-grain (2.9 g) ammunition of around 3,500 feet per second (1,100 m/s).
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 ...
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.
[4] [5] How the ammunition is designed to change direction in mid-air is classified. The second phase of the program was completed in summer 2014 with a number of improvements provided. The next phase included further refinements and a system-level live-fire test. [6] The EXACTO program completed another round of live-fire tests in February 2015.
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.
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).
Maximum range is constrained by use of the existing Hydra 70 motor, but since the seeker can see as far as 14 km (8.7 mi), a more powerful motor could extend range while retaining accuracy. [11] Nammo is working on a modified rocket motor that can extend range to 12–15 km (7.5–9.3 mi). [12]
While production of XP-100 pistols chambered in .221 Fireball was eventually canceled after 1985, [3] Thompson Center Arms produced various single-shot pistols chambered for the .221 Fireball as part of their Contender and Encore models. Rifles chambered for the .221 Fireball include the Remington 700 and the Ceska zbrojovka CZ 527.