I shot 3 animals in Africa using my Kimber Montana and Barnes Vor Tex 120 grain TTSX factory ammo. A warthog broadside at 70 yards, complete pass thru and DRT, shot behind shoulder. Bessbok at 159 yeards, spined him, bullet not recovered, needed a finishing shot and a smallish impala (22"), shot thru both shoulders and bullet was found opposite side skin, DRT, lost a petal. Impala was about 70 lbs, I would use a 140 or 150 grain bullet. Good luck.
