When one of the first threads on this surfaced, I commented on the out-of-the-box accuracy of the Savage 12 LRP in .260; and was reminded that there's more to PR competition than accuracy alone. I don't shoot these comps so I can't comment on the specifics of where the advantages of a stock like the Ruger's come into play. Since it's apparently not about shooting bugholes- "accuracy" becomes a LOT more relative to other considerations.
But, I do think it's an important consideration, as is the distinction between pure rifle accuracy- and the things that make the shooter more accurate as in a finely-tuned trigger, or perfectly ergonomic rifle. I believe these get lumped together far too often.
From purely a hardware perspective, a perfectly trued action that's locked down stress-free and doesn't move in it's stock or chassis, fitted with a defect free match barrel installation- is what it's about. It can be done with a 700 action or one of it's many clones- or perhaps with the new Ruger action.
Design certainly may have an impact, but beyond those usually subtle differences the steel doesn't know whose name is stamped on it- true, is true.
That said, IF the Ruger doesn't shoot as accurately as some others "out-of-the-box"- it becomes a question of "what's it take" to make it do so. If, by the time you get done trueing the action, installing a match barrel, and messing with the trigger you're at the same cost as a custom 700 build, what was the point outside the stock design- which can also be replicated?
Just my $.02, worth exactly what you paid for it.