Re: What Scope?
I agree with Nate, "unless you need low power for short-range hunting",because its nice to have the high power end for sizing up game at a distance.
But if you will ever use your .308 in the woods, the 6.5X will seem like 20x and you'll be sorry that you mounted such a powerful variable.
I put a 3.5x10x40 on my 7STW and couldn't be happier. You can EASILY shoot out past 600yds with a 10x scope. I've shot small varmints @ 800yds with a 12X and could see and hold great.