The term "magnum" has never been applied to any .30-06 case, whether wildcat or commercial. The only possible exception (which would be a real stretch) is the .240 Weatherby, whose only feature that might qualify it as a magnum is a belted case.
MD-
A tiny nit to pick: The 6.7x60 Eichhorn Gamlakarleby Magnum is built on a 30-06 case. A belt is swaged onto the case, which may put it at the fringe of your category.
The cartridge is listed in Vol II of the Ackley handbooks. Eichhorn described the cartridge originally in the July 1964 issue of
Gun World, p.34.
--Bob
