The S&W 1500 is the same action as the Howa 1500 or Weatherby Vanguard. The Sendero would be a comparable gun to the one you describe. The 300 Winchester is ballistically superior to any of the calibers available in the Ruger Precision Rifle (which is a $300 rifle in a $1000 chassis). My advice is to keep and shoot your nice family heirloom and don't get caught up in the "it's new so it must be better" advertising hype. Get a higher magnification scope if you feel you must, or just learn to shoot as well as your Dad and Grandpa.