I got used to shooting deer and them falling dead in their tracks this lasted for about 10 years and then I had a monster buck hit dead to the world, or at least I thought I did. The buck ran another 400 yds and right into another hunter. It basically flopped over in front of him with a few drops of blood (It lost most of its blood when I shot it and over the first 100 yds). What that tells me is you never know. I used to only shoot deer in their vitals up to that point. I still do most of the time but if I'm in an area with alot of other hunters I go for a double shoulder shot. I don't want that deer to be able to move at all. I would rather need a second shot then loose him as he runs into another hunter.