RE: Walmart rifles....and resources...
I would go with the 7mm Mag if you want more poweranddistance. I
don't think you need the 300 Mag unless you plan to hunt larger game.
Heck, go with a .270 or .280! I'm quessing all you want to hunt is
Black Tail. The two rifles you mentioned are good, if it is a matter of
cost for you, go for the Savage Combo.