Thank you for the research Doubleriflejack!

As for option 2, would it at all be possible to ream out the chamber for the regular .318WR since the straight wall chamber is larger? I supose the barrels have to be set back or something in order to do this?

Its like, you can ream out a 6.5x55 chamber for the wildcat 6.5-06, but you cant go the other way around without setting back the barrel right?

If it is possible to ream out the chamber, will the rifle value drop? Are oddbal calibers/chambers priced among collectors?