RE: Rifle
ya, i agree. The kid should be able to handle it. There are a lot of .338 calibers out there, do some google searches and research them. Remington, Winchester, Savage, all good brands w/ modest price tags.
Scope: Mid range 3-9 X40, Burris, leupold, ect.
Get a good Sims butt bad or something similar, and he'll be set.
Good luck, and Good hunting.