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 ...

H4350 is a good choice for handloading the .300 WSM, and it performed well with Terminal Ascent 175-gr. bullets. Average velocity was 3001 f.p.s. fired with a 65.0-gr. charge for an extreme spread ...