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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] It is a further development of the Winchester Short Magnum concept utilizing smaller bullets, but of a still higher velocity.
The original Winchester factory load consisted of a 275-grain (17.8 g) bullet at 1,480 ft/s (450 m/s). [1] This straight-walled cartridge case was designed for black powder rather than smokeless powder. .38-72 Winchester case dimensions. Besides the Winchester 1895 lever-action, the .38-72 WCF was chambered in the Winchester 1885 single-shot rifle.
The principle at work in the short magnum cartridge is the fitting of larger volumes of powder in closer proximity to the primer's flash hole, resulting in more-uniform ignition. .300 WSM has a case capacity of 80 grains. The .30-06 Springfield holds 69 grains; .308 Winchester holds 56 grains; 30-30 Winchester holds 45 grains.
The high-velocity smokeless load was in a class with the .444 Marlin, [4] and its power exceeded the .348 [5] and .358 Winchester. [ 6 ] Winchester continued to offer the cartridge commercially until 1935 [ 1 ] and while it is still offered by some suppliers, due to its obsolescence and resultant obscurity, it is significantly more costly than ...
The .38-55 Winchester / 9.6x53mmR cartridge (actually .3775 caliber), also known as the .38-55 WCF and the .38-55 Ballard, [4] is a centerfire rifle cartridge. It was based on an earlier cartridge called the .38-50 Ballard Everlasting that was introduced in 1876 by the Ballard Rifle & Cartridge Company .
The Winchester Big Bore Model 94 Angle Eject rifle was the only rifle produced to fire the cartridge, though competitor Marlin Firearms created some prototype model 336 rifles chambered in .307 Win. It is still commercially loaded today, but many handload to gain better performance and accuracy.
The .45-75 Winchester / 11.62x48mmR Centennial is an intermediate centerfire rifle cartridge developed in 1876 for the newly designed Winchester Model 1876 Centennial lever-action rifle. Winchester Repeating Arms Company introduced the rifle and cartridge at the United States Centennial Exposition .
The .284 Winchester was designed to achieve .270 Winchester and .280 Remington performance from the new Winchester Model 100 autoloader and Winchester Model 88 lever-action rifles. The result was a 7 mm cartridge with about the same overall length as the .308 Winchester but with a wider body, that yields a powder capacity about the same as that ...