Marksmanship.
I entered the police academy at age 20 never having fired a handgun. After two weeks of training I qualified best in the class, with a perfect score (pistols only, the 12 gauge is an enigma to me) on qualification day.
Years later, I met my father-in-law, a big hunter. He took me to an outdoor range and I shot a tighter group than he did (I'd never fired a hunting rifle) and he's been hunting for 40 years. He was both happy and pissed.
Throughout 14 years of military service I never qualified less than expert with anything, except the 12 gauge. While stationed on board ship, I was the only crew member that was not a gunners mate that was authorized by command to instruct in marksmanship.
I can't really explain it, but for some reason putting holes in things from a distance, just came naturally. I'm a fair hand with a bow as well.