Berger Bullets 4PH7080C Unprimed Cases 300 WSM Rifle Brass 100/BoxAmong the multitude of new cartridges, one of the most successful of these has been the 300 Winchester Short Magnum (WSM). The 300 WSM provides many competitive features and advantages over legacy belted magnum cartridges, delivering energy equal to the 300 Win Mag and conveniently integrated into a short action rifle design. These features include enhanced rigidity, a shorter bolt throw, a compact powder column, and reduction in weight all attributes