ORIGINAL: SyPTo
actually the M1903 (rifle)that used the 30 caliber bullets used 30-03 (30-45) in 1903 the rifle underwent some revisions in 1904/1905 and in 1906 it was revised to specificly fit the new 30-06 cardridge.
And before that was the .30-40 Krag. There many original .30-40 Krags in Cuba
today. Many were passed down from thier grandfathers of the Spanish/American
war.