There is a picture that I saw - can not find it - maybe in a book written by Finn Aargaard - was of that 458 Win Mag that Phil Shoemaker uses for big bears - as I recall, the bolt was perhaps 1/4 or 1/3 of the way forward - the cartridge rim was fully up behind the extractor on that Mauser and the cartridge was dead in line with the chamber - I think the bullet was pretty much into the chamber all ready - but was no knocking around for that cartridge to rattle into line to get into that chamber - was already set up, in line, when the bolt had only moved a short way forward - no doubt contributing to VERY slick re-chambering of next cartridge to be fired, when cycling that bolt. As I recall from Phil Shoemaker's writing, was MUCH careful honing done on those feed lips to get that. I believe that rifle started as a Mark X, which I think is a predecessor to the modern Zastava.
