I'm very sorry about your loss.

If my opinion would help (since I'm 16) I would recommend the .308

I took my first deer with my fathers Rem. 30-06 SPRG. and I really like everything about it....not too much recoil, not too heavy of a rife, and not an elephant killer.

The reason I'm recommending the .308 is because you have the M1 30-06 which I think is too clumsy for deer hunting.

I wish you and your grand son the best!

Regards,

Peyman