Quote: The No. 1 in .300 would be my choice of the factory guns to rebore to .318 or .333 because of the barrel length and sights.
I would have to check, but I think the length of the H&H chamber would preclude the use of the barrel for either of those as a simple rechamber and rebore. Maybe the .333 could be done, but not the 318 unless the barrel was set back a little.