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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 .284 Winchester case is very similar to the .308, however, the .284 case has a body diameter of 0.500", and the .308 case has a body diameter of 0.471". Both share an identical head/rim. The 450B is limited to 35,000-psi, which is more common in pistols, and lower than similarly sized rifle cartridges.
From left to right: .223 WSSM, .243 WSSM, .25 WSSM, .270 WSM, 7 mm WSM, .300 WSM, .325 WSM. Winchester Short Magnum , or WSM , refers to a family of rebated bottlenecked centerfire short magnum cartridges developed in the early 2000s by the U.S. Repeating Arms Company , the maker of Winchester rifles and one of the oldest firearms manufacturers ...
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 twist to allow for the slightly heavier bullet.
List of Winchester Center Fire rifle cartridges.More commonly known as WCF, it is a family of cartridges designed by Winchester Repeating Arms Company. [1] There are many other Winchester cartridges that do not carry the WCF moniker, such as the .300 WSM. .270 Winchester, and .300 Winchester Magnum
The 6mm XC was initially developed as a Wildcat cartridge specifically for NRA High Power match shooting by 11-time US National Champion David Tubb. [2] [3] The round originated from chambering a barrel using a .243 Winchester reamer held short, with the case reformed from .22-250. [2]