I know what you mean. My youngest was the same way. He even bought his own .22 at one of our banquets. Of all the things a teenager could spend money on, he decided on his own rifle.
We've sponsored a group down here that is introducing high school students to the shotgun sports - Trap, Skeet, and Sporting Clays. There are 80 kids signed up and 40 or so more on the waiting list.
The parents attend practice sessions with some of the kids, and the leader told me last week that some have even said they get along better now with their kids than they have in years.
I have noticed how much more grownup she acts now...she is doing better and she has a blast shooting my 45.