I was visiting my dad in So. Cal. and he showed me my future inheritance. A Springfield 1903 w/ a custom stock that my grandfathered carved. Serial number puts it at a 1918 build.
30-06. They were 30-03 prior to 1906. The 30-06 was created based on the 30-03, but they wanted a pointed tipped bullet. However, my info is based on wikipedia, so don't hold me to it...lol