I've used the Hornady Light Mag 139 SST's for years now. Usually the most accurate factory ammo out of several different rifles I have had. Shots under 60 yards or so they can either pass through or blow apart and cause major damage to meat. 100 yards to 400 yards they have been excellent on deer, antelope and Caribou. September Antelope in NM used this round to anchor a nice buck at 287 yards.