 Heavier bullets of 300 to 350 grains are not advised for hunting because the muzzle velocity will be about 2000 fps or less, which is insufficient to provide normal expansion in most contemporary bullets (which have much thicker jackets than bullets manufactured in the early 20th century).The cartridge and carbine were primarily made for serious hunting in Africa or India.They were made to be carried over long distances in a hot climate and shot only rarely (the classic "safari").