I've got rifles with peep sights and rifles with scopes. The scopes biggest advantage is allowing you to see the animal even when obscured by brush or shadow.
FWIW, I would not sell the M1. Either understand your limits and hunt accordingly, or get another rifle. Or do both.
I understand that repeated use of the -06 ammo over 165 grains can accelerate wear on the Garand system. I have no idea how many rounds this tabulates too before your operating rod gets bent - surely more than a couple of boxes.
I like the Federal Premium ammo w/Ballistic Tips (150 grain).
Giz