I don't really count air rifles and beercan plinking as a boy. I guess i "grew out" of it in high school. I was lucky enough to have a father that was willing to "let me use his legally-purchased-for-himself Ruger Mark II", any time I wanted, for a large up-front fee.
I went out regularly to the range then, sometimes burning through two bricks of .22lr in a day. Man, those were the days. Eventually that too faded, and from about 20-23yrs old i didn't have much interest in guns, shooting or collecting.
Then came 9/11.