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Winchester Super Short Magnum : ウィキペディア英語版 | Winchester Super Short Magnum
Winchester Super Short Magnum, or WSSM is a line of rebated rim bottlenecked centerfire short magnum cartridges introduced by the U.S. Repeating Arms Company (''Winchester Inc''). It is a further development of the Winchester Short Magnum concept utilizing smaller bullets, but of a still higher velocity. ==History== Winchester and Browning partnered to create a new shorter version of the popular WSM (Winchester Short magnum) case. The new "super short" case was to be based on design principles currently proving successful in benchrest competition, such as the 6 mm PPC and 6 mm BR Remington. In 2003 the first cartridges of this design, the .223 and .243 Winchester Super Short Magnums (WSSM), were introduced. The .25 WSSM was added to the family in 2004. None of the cartridges have managed to capture any large market share. This is likely due in part to the fact that all three cartridges have similar performance to existing popular cartridges. In addition, the .223 and .243 versions early on attained a reputation for quickly eroding the rifling in barrels.〔"(Barrel-Burners )" by Craig Boddington from Guns & Ammo, December 2004〕 Concerns about short barrel life are a common problem for high-velocity cartridges, making the WSSM rounds no different than other high-velocity cartridges. To help mitigate the problem, Browning currently uses chrome-lined barrels on all of their guns chambered for .223 WSSM.〔"(223 WSSM vs the 22-250 Rem )" from Browning〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Winchester Super Short Magnum」の詳細全文を読む
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