Both my 30-06's wear 4X scopes. That's the way my grandpa always did it. His Husqvarna 30-06 always wore a Leupold 4X. My dad on the other hand always had a 3-9X on his 7600 Carbine. My Grandpa even took pronghorn with just his 4x scope on the Husky 30-06. I guess that kind of swayed me in his direction. I have made my longest shot to date, a 300 yarder, on a buck with a 760 Gamemaster 30-06 and a Bushnell 4X scope.
I made my longest shot with a Ruger 77R .30/06 at roughly 400 yards (one quarter-section fenceline to another), using Federal Premium 165 Sierras. I got a deal on some water-damaged ammo (just discoloration) and bought 100 rounds. Seemed like it took forever to shoot it all up). That Ruger had an old K-4 Weaver on it. I should have kept that rifle......................
You can roll a turd in peanuts, dip it in chocolate, and it still ain't no damn Baby Ruth.
