Also, my experience with "grip distance", (if You refer to where the pistol grip is relative to the trigger..), be careful, especially with a stiff recoiler like a 7mag. Too close and the trigger guard comes back against the fingers in a most unpleasant manner.
I would suggest modifying a standard stock until it fits your son "just right". Don't afraid to be ruthless in your cutting and patching. Car bondo is an easy add-on, and easily shaped after it hardens. Once you get it, then send the ugly template-thing off to a stock copier.
What about those component stocks that competition target shooters use, they're infinitely adjustable. Or that new Boyd's "At One" stock?
