Now that's funny right there. I don't care who ya are. Where did you find this ridiculous tidbit?
Winchester called it the 30 Gov't 06. Before that it was Ball Cartridge, Caliber .30, Model of 1906. I'm just messin wit ya, not trying to jerk your chain. .275 Rigby and 7mm Mauser(7X57)are the same..30 Gov't is short for .30 Gov't 06, It is the .30/06. You're right about the .30 Army, it is the .30/40 Krag. Other cartridges with 2 names are .244 Remington(6mm Remington) and .280 Remington(7mm Express).