I think this just adds on to the expression 'to take one [shot or blow] to the head. Not very imaginative.

Examples:

... practice shooting at cardboard targets. Two shots to the chest, one
to the head. Reload. Repeat. Airline security surcharge takes ...
Beskrivelse: New Jersey's leading source of online news, business and sports updates from the Newark Star-Ledger,...
www.nj.com/news/ledger/

... Lewis was on his toes more than Rahman. Rahman got in a jab to the body and Lewis
answered with one to the head. Lewis landed to stiff jabs to the head. ...
www.lasvegassun.com/sports/boxing/ rahmanlewis/roundbyround.html

... safely". The body, which was returned to India on Saturday, was said
to have two bullet wounds - one to the head and one to the chest. ...
news.bbc.co.uk/hi/english/world/south_asia/ newsid_356000/356972.stm

... crosshair over his head, then wham! You take one to the head and go down
screaming. You just lost a quick draw. The Quick draw is when ...
www.planettribes.com/sniperschool/103_2.shtml