Although not a Mauser per se....I have a Winchester Model 70 Safari Classic in .375 that is one of those "special" rifles. The bolt feels, and oddly enough, sounds, like it is moving on ball bearings. Incredibly smooth and slick. Next to it in the gun room is a Safari Express in .458 that in theory, should be exactly like the .375 but is not. Its pretty smooth, but not near the same. Very odd.
Mausers do of course benefit from polishing the action and you can feel the difference once you do one.