I'm a fan of the '06 case.Whelen was the Commanding Officer at the Franklin Armoury at the time either he or staff member James Howe, developed the 35 Whelen. Whelen had access to all the info on foreign cartridge developments, both military and civil. The 35 Whelen is likely nothing more than a copy of the 9.3x62 re-dimensioned to the 30-06 case. US case law at the time didn't recognize IP theft .