I have a 6x20x50 scope leupold VXIII thinking of buying a tikka T3 7mm mag. Im unsure about the scope being to much for the rifle. I had a 4.5x14 nikon on a 280 rem and at 400yards the scope didn't have enough zoom for me. I hear of guys shooting 400 yards with a 3x9 but I couldn't imagine that! I know Dave Long hunted with a 20x in his book but he might have a better rifle for the scope? I want to set this rifle up for big country hunting(tetons, colorado high country, etc.).