I ve had a couple 20ga slugs not pass through but the deer hasnt made it far always in sight win BRI i found in the skin on the other side and it was a 30 yard quartering away i also had a partition gold stick in the of skin on a 80 yard shot then pass through at 150 yards both broadside and not hiting any noticeable bone ive had the same thing happen with my muzzle loader but in all cases the blood trial has been easy to see