This calibre was introduced to the market in 2001, driven by Winchester who wanted to rejuvenate the 270 Winchester by ramping up its external ballistic performance. The 270 Winchester Short Magnum, or 270 WSM, is a short magnum created from a necked-down 300 Winchester Short Magnum cartridge that is specially calibrated to fit a .277 inch (7.06 mm) bullet; despite this, the name of the calibre is the "270". The 270 WSM improves on the 270 Winchester with a higher velocity bullet that gives it a flatter trajectory. This external ballistics mean the 270 WSM can fire bullets with the same mass along flatter trajectories over longer distances that easily exceed 300 metres. The very flat trajectory together with higher kinematic energy have seen the 270 WSM quickly taken up for hunting large mammals such as stag and large boar, while still being suitable for use against smaller mammals. The bullet travels 230 ft/s faster on average compared to the same bullet weight on the 270 Winchester, from a shorter case. As a result, it can be used in more compact, easier handling guns. Winchester offers a range of seven loads in bullet weights from 8.42 grams (130 grains) to 9.7 grams (150 grains).