If you read Bellm's web site, you'll see that this conversion is one he designed for shooters who want .300 Savage performance in a Contender but don't reload. The .300 AI doesn't shoot any harder than .300, but puts less stress on the gun. Think it as a .30-30 AI that you don't have to handload to get the performance, and you'll be pretty close.
A .308 is too much power for a Contender, even a G2. No problem in an Encore, but the OP wants to shoot a G2.
I can't help with a scope. My .300 wears a VXIII 1.5-5x, but I hunt in places where 200 yd shots are long ones.
