I have shot a fox and a spike buck with them. Both went down fast, but I hit the buck in the top of one shoulder and the arrow centerd the far shoulder. Deer ran 50 yards, 0 blood trail, but I heard him crash. I found the arrow with the fully intact broadhead down the trail 30 yards. The lack of blood came from the high entrace would and no exit would. I can't complain with the results, but try to stay away from that bone.