Id have to go with Bountyhunter on this one too. 7mm08 is a great round for youths. You might have a look at the youth rifles that howa is making. They are about 6.5 lbs, and the ones ive messed with were very accurate.If he outgrows the stock, point him towards www.boydboys.com
who have a varitety of stocks from varmit to sporter for this rifle (since all of the stocks sold on howa rifles come from them) for about $130 no matter the style, finished and ready to mount. I had a coworker who bought one of these rifles a year, for 3 years in a row. His wife claimed the first one, his oldest daughter the second, and his youngest daughter the third. He is hoping to keep this years for his own. All 3 have killed deer so far with theirs btw.