Your rifle is going to "recoil into your scope" no matter what you do. If a scope fails from recoil its not how you bed your rifle, it's probably a faulty scope. Yes a 7 mag has a bit of recoil but most quality scopes are built to withstand much more recoil than that.

One piece bases are going to be stiffer but a two piece base and your leupold rings will not ruin a scope unless you tighten the rings too far down on the scope.