I have always had a bit of a thing about Big Bores (above .400) built on standard length 98 actions. Mainly because it can be done and it is also a damn site cheaper using an FN 98 action than it is finding, then buying a magnum length action. I think the most popular Big Bore cartridge ever built on a standard length action was the .404 Jeffery followed very closely by the .416 Rigby, both of these being fantastic calibers. Other calibers on the 98 standard length action were the .500 Jeffery, .458 in Mag, .425 Westley Richards the 11.2x72 Schuler would of been a good candidate too. My favorite the .416 Taylor, which is a potent little round and one I might build for myself after I finish the other multitude of rifles in line before it. What other plus .400 calibers were popular choices for the standard length Mauser 98 action that you know of? Also to try and kick a discussion along, what advantages were there in using these actions? I can think of a couple.