I think you're missing the point...

most of the rifles cited spent 30-90 minutes being bounced around while in transit to the hunting locale of the day... when the client released the safety in preparation of the shot... BOOM!

we not talking a few months worth of dust here... just a few miles.

still, I have been told that it can be fixed with some reasonable degree of certainty, but the adjustments would seem (to me) to make the problem worse.

and seriously, who needs a bolt-gun that's that expensive... you're talking $2000+ for most of those guns IIRC... thats a LOT of custom mauser IMO...