With all due respect Jeff, do you really think there's such a thing as "guaranteed" dead or not dead? Whenever I hear someone use that word, in any walk of life, but especially bowhunting, I have to question where it's coming from.....
How many turkeys have you killed? And how many by shooting them in the head?
What happens if you shoot his beak off...that isn't anywhere near a dead turkey. You may knock him off his feet, but I bet he'd be up and gone before you could get to him. Then what kind of shape would he be in?
How about if you just slice the skin and he ends up with a festering wound?
If you cut the hoses running down the neck, or break some bone(neck, skull), then yes,you've got a dead turkey. But there are always variables that "guarantee" nothing....
I'm not against head shots at all. Personally I just can't get myself to try it....
My Dad told me long ago that "there are no guarantees in life"....