hargroderauto,
Isn't a 12-ga 3-inch mag enough for turkey and ducks? In previous threads on the 3-1/2-inch mag, IIRC, most folks would opt for a heavier 10-ga instead of shooting a very hard kicking 12-ga 3-1/2-inch pump.
Actually, I cut my first reply short, my first concern was to get you to think very seriously before you got a 3-1/2-inch 12-ga pump gun. Now, I'm going to step two, and suggest you forget about another pump and look into an auto or O/U gun.
Except for American trap, the clay games all require a quick second shot. If you are going to do any clay target shooting, a pump is a hindrance. Of course, there are those who claim they can shoot a pump just as well as an auto; but, I've never seen one in the winner's circle.
IMHO, there are two types of clay shooters: Those who want to shoot the best they can (I've never seen anyone who wasn't excited by their 25-straight). Then, there's those who don't shoot enough to learning anything beyond familiarizing themselves with a specific gun (typically just before hunting season, or just after buying a new HD gun). If you or you son might find yourself wanting to try to do your best with clays (and upland birds), then I recommend an auto or O/U for your next gun purchase. Whatever you select, your son is in for a great Christmas.