All I can offer that says differently is an assertion of my personal possession of a factory CG63 in .308.
Since I traded the rifle off some years ago and my records were lost in a house fire, I cannot show you documentary proof.
There are www references at
http://www.northcapepubs.com/swmauser.htm
http://en.wikipedia.org/wiki/Swedish_Mauser
Unfortunately secondary or tertiary references, but the best I can (or will) do now.