The .300 Winchester Short Magnum (WSM) was introduced in 2001 and has become an extremely popular magnum cartridge because big-game hunters and handloaders have discovered it works well with a variety ...
In 2001, Winchester and Browning collaborated to introduce Rick Jamison’s .30 caliber wildcat magnum, which was branded the .300 Winchester Short Magnum or WSM (sometimes pronounced “wizzum”). By ...
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