Originally, the rifle was known as the U.S. Magazine Rifle, Model of 1903. Complete with a device on the left of the receiver, called a magazine cut off that prevented troops from wasting ammo. The cut off allowed the magazine to be filled with 5 rounds. With the cut off disabled, t...
It had a muzzle velocity of 1700 feet per second when fired from the M1903 Springfield rifle. See "Hatcher's Notebook", by Julian S Hatcher, Major General, U.S. Army, retired, 1947, for lots of details and anecdotes of the ammunition testing and evaluation processes. .30-06 ...