Actually, .300 Savage factory fodder, while nonetheless mild, is a bit much for the Contender, and while both J.D. Jones and Fred Smith once chambered for it, I don't think they'll do so anymore -- much like the BRs, which JD chambered for a while before they were determined to be too much for the Contender.
With the Contenders, it's not simply a numbers game with pressure when it comes to safety and limits. Many factors come into play, including case taper.
Your choice of a Waters was a good one. You'll enjoy it.