I have shot a lot of deer with a bow/crossbow over the years and I have found one observation to be true. When you put a sharp broadhead thru the heart/lung region they dont go very far. Put it where its supposed to go and you will have a awesome blood trail and probably see or hear the deer fall. I will be the first to admit I have made some bad shots, (lost a deer just last week) and some of those deer I have recovered after extensive tracking. I just hear a lot of folks (not so much here) claim they made a perfect shot and cant find their deer.If you put it through their boiler room they will die quickly.