I would also like to add that Tom's point about skeet, trap etc... is solid. I dated a girl in Lejeune whose father hunted everything that moved. He turned me on to skeet and so many of my skills were honed in the months we shot together.
I can not think of a better exercise for instinctive shooting, overall barrell/sight alignment, target lead or sheer enjoyment. Hitting the pigeon with a pellet or two is nice but nothing says "fun" like literally turning 25 flying objects into flying dust from a variety of angles.
Bookmarks