hit two with judo today, one penetrated and killed, the other hit square bounced off and didn't . if they penetrate those springs grab guts and they never get away. they dont work all that great tho overall. they are meant for stumps.
what i have taken to doing is making cuts int the back of a glue on field point, and flaring them out with pliers, once it goes in it doesn;t come out till you pull it out. and sometimes it will bounce off tree and not stick, main issue i have with using broad heads,