Apologies if this has been posted already but there seems to be a recurring mix of information/ miss information about the dispatching of animals, methods, equipment etc. Just thought it might be worth putting a couple of links up for those seeking advice/ assurance. It's not the be all but its better than some rural myths/ urban legends recounted on occasion.
Here's some good info on equipment, placement and angles on a variety of animals:
and for deer specifically: