5'-11" and 230, cripes I was thinking that he was smaller than that. You son is almost bigger than me 6'-2" 210[:D]. I would take him out with your other 2 sons 12 and 20 gauge shotguns and the 30-06 and see what he thinks. With a 30-06 I am fairly certain that there are tons of different bullet grain weights that would vary the recoil force.
Yes, he is a big boy!! I have read such good reviews on the Savage 111 30-06...it's really tempting to just go buy it while it's on sale. I wish you could return a gun if unused within 30 days, but the sign says all sales are final. Think it will go on sale again in December, before Christmas? We won't be anywhere near a Dicks on black Friday... Also, any idea how much a Remington 700 is? I also may check into some of the guns mentioned above.