Yes, you should of backed off after you marked the start of his blood trail! Obviosly your a bow hunter so you should know this. I shot a buck in the brisket, barley nicking his front, he ran about 75 yards and died though. It was with a 50 cal. black powder, a nice big slow bullet. Keep hunting the same area and he'll turn up, it's cold enough for him to last a while!Good Luck!!