スプリングフィールドM1903の銃弾の大きさは？
Approximately 500,000 "Krags" were produced at the Springfield Armory in Massachusetts from 1894 to 1904. It was the U.S. Army's primary rifle from 1894 to 1903 (when it was replaced by the M1903 Springfield rifle with its ballistically similar .30-03 cartridge), and found use in the Spanish–American War and the Philippine–American War. In this later war the rifle was referred to in a song popular with U.S. troops, a parody of "Tramp! Tramp! Tramp!", with a verse running:
.30-03