carebear said:The '03 Springfield was adopted in, what, June of that year?
Remember, the Marine Corps at the time was still primarily spread out in ship's detachments, not formed, centrally-based infantry units. Also, we were poor, just like today. "Correct" or not I certainly wouldn't be surprised if it took that long to get enough Springfields out to arm all those dispersed units.
Heck, after the transition away from the .45-70 Springfield conversion some Marines were using the 6mm 1895 Lee Navy rifle into the first part of the 20th Century (Boxer Rebellion).
As usual, I should have read through all the replies before posting. Carebear is qutie correct, the Marines used the 1895 Lee at this time.
FWIW, the M1903 had a much longer service life than generally imagined, as did the Krag (although the Krag's life wasn't with the Marines). The Army even took a few Krags to Europe in 1917 to train with. The M1903 remained a front line weapons in various roles all the way through World War Two, and remained in use in declining numbers a ship board weapon and a sniper rifle well in to the 1960s.