I have seen it work and I have seen it fail, butI won't take that shot. About ten years ago I shot a very nice 8 point. Just as I released the arrow, the bucklunged forward and the arrow sunk into his hind quarter. Never could find that deer, blood trail stopped 200 yards out. A guy I know shot the same deer during gun season, the broadhead lodged in the hind quarter and healed over pretty good. So that shot doesn't always work.