a box of 100 muzzeloader balls are less than 10$ tell your buddy that you will site the gun in for him or he should stay out of the woods. did he get down from his stand and look for the deer he shot at? if he is using patch round ball its possible for even a pass through shot to have no signs of blood for 70 yards. because the wound can close up. i heard of a guy who shot at deer all day long and thought he kept missing only to find a couple piled up in the wood line across the field he was shooting across. some people hunt and some are hunters.