You know this has got to be the most I have heard the head shot theory. I dont know about you guys but my first instinct is not to shoot the head because if I am shooting it will be worth mounting . But that is just me , If you look at the size of a deers head verses its body in the heat of the moment which one presents the best target ? That would not be the right time to worring about a head shot and exact bullet placement. Most deer hunters shoot there deer rifles less than 10 rounds per year ( atleast the ones around me ) that is not going to give them the skill required to pull off head shots. So it shouldnt be allowed (.223) as a deer cartridge if the only way to kill humane is a head shot !! Thats ridiculous , why waste a deer for that, every life has a soul !!