RE: Head shots?
Have shot several with rifle and shotgun (buckshot). With buckshot at close range (<30yards) its the shot of choice on a doe for me. Most of my deer culling involves .204s and headshots as well. For hunting purposes, I like the high shoulder/base of neck shot through the front of the scapula that takes the spine right where it dips before going into the neck. Never ever lost one with that shot.