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The .243 Winchester Super Short Magnum or .243 WSSM is a rifle cartridge introduced in 2003. It uses a .300 WSM ( Winchester Short Magnum ) case shortened and necked down to accept a .243in/6mm diameter bullet, and is a high velocity round based on ballistics design philosophies that are intended to produce a high level of efficiency. [ 2 ]
The .243 Winchester has also been found to shoot flatter and more accurately than the 7mm-08 Remington out to 500 yards, with less recoil yet also less terminal energy. [11] (Left to right) .223 Rem, .243 Win, .308 Win. The recoil has been measured to be so light that it "can be shot by anyone that can handle a rifle."
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]
The standard bullet diameter for 6 mm caliber cartridges is .243 inches (6.2 mm), the same diameter used in the .243 Winchester and 6mm Remington cartridges. To obtain maximum accuracy, bullet weight and form are matched to the rifling twist rate of the barrel. Typically, 68 gr (4.41 g) bullets are used in barrels with twist rates of 1 in 13 ...
6mm Remington (left), .243 Winchester (right) The .244 Remington lagged behind the .243 Winchester in the marketplace of the mid-1950s. Winchester also introduced a similar dual purpose cartridge of the same caliber with greater success in 1955, the .243 Winchester, but with 80 and 100 grain bullet options for its Model 70 with a 1 in 10-inch ...
It is touted as being one of the most accurate long-range 6 mm rounds in the world that is designed for repeating rifles. [citation needed] The 6XC is now a CIP standardized case. [5] The origin is listed as Sweden since Norma standardised the case. Factory brass is available from Norma and Peterson. [6]
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0.243 62mm also 6×62mmR, based on 9.3×62mm case. 6mm Lee Navy: 1895 US 0 R 6×60mmSR 2560 1629 0.236 60mm Service cartridge of the United States Navy and Marine Corps from 1895 6 mm PPC: 1975 US R 6.17×38.5mm 3212 [9] 1660 [8] 1.034 31.7 [9] 0.243 [10] 0.376 [11] 38.5mm Benchrest cartridge - "the most accurate round ever developed."