have hunted with many brands of rifles and have never had any reliabilty issues with any of them, but my Blaser R-93 and Sauer 202 are the most accurate rifles that "I" own. I have never been to Africa or Alaska, so I can't say that guides in either place don't use them. As far as long range competitions, that is not a subject that I am familiar with, but in hunting rifles, there is no need for a Sauer to be a "basis" gun when they shoot sub MOA out of the box.
This thread is very misleading as there is no such perfect rifle that is both most Accurate and Most Reliable. There are tradeoffs in every design. If one were to get the most reliable rifle for the money then they would get a Empire Arms or a Heym,Mitchellsor use a heavily modified Model 70. That rifle would allow one to hunt in Alaska and Africa . I will bet that most guides in alaska have some version of a Ruger 77 or a Model 70. In Africa my bet goes to CZ(brno),Mauser and Model 70's. Accuracy well I have not heard of "Most" accurate rifles built on Mauser derivatives or Model 70's. The ones I have heard that give great accuracy would not be my first choice if my life were on the line on a DG hunt. Last time I checked high gloss bluing and impeccable checkering and a super smooth bolt don't equate to reliability .