I'm not much of a head shooter, but I shot a moose at 356 yards in the head last week.
I was lying with my backpack on a log, and for some reason I shot the moose to far back. I couldn't believe it when my buddy (who was videoing it) said "too far back!"
I was thinking "impossible, I was steady and I was shooting at a huge effing moose shoulder, but I guess I pulled the shot somehow without realizing it.
The moose ran behind a tree and was only showing his rear and his head and a bit of his neck, so I shot it behind the ear. It dropped.