M1903 Springfield

Springfield M1903 Mk 1 - .30-06 Springfield

Closeup detail of the M1903 Springfield above - this model is receiver cut for a Pedersen Device, detailed below.

Springfield M1903 Transitional (pre-WW2) issue - .30-06 Springfield

The Springfield M1903 was the first service rifle to be adopted by all branches of the United States Armed Forces. It is a Mauser-style turnbolt action with a 24" barrel, 5-round staggered-column box magazine contained within the stock, and straight-grip single-piece stock. It fired the new high-velocity .30-'06 caliber cartridge which would become the standard US rifle and machine-gun round for the next 50 years.

Background

Development

During the Spanish-American War, US Army troops in Cuba found their Krag-Jørgensen rifles severely outmatched by the Spanish Army's M1893 Mauser rifle. The high-velocity and flat trajectory of the 7x57mm cartridge compared to the .30-40 Krag made the Spanish rifle more accurate, and the Mauser design allowed for immediate reloading of the entire magazine via stripper clips, whereas the Krag could only be loaded singly. This gave the Spanish a decisive advantage in rate-of-fire. Another notable advantage of the Mauser was the smokeless powder used in the cartridges, which made their wielders extremely hard to spot, in sharp contrast to the puffs of smoke produced by the Spencer 1860 Carbines used by some of the U.S. soldiers, which made them easy targets for Spanish marksmen.

A more powerful .30-40 cartridge was developed in 1899, but generated too much chamber pressure for the rifle to withstand repeated firings. It was decided that an entirely new rifle was needed. Thousands of M1893 rifles - surrendered by Spanish troops in Cuba - were returned to the US and extensively studied at Springfield Armory, where it was decided that the Mauser was the superior design. A prototype rifle was produced in 1900; interestingly, it was very similar to Rifle No.5, the final M1892 Mauser prototype in the US Army rifle trials of 1892. This design was rejected, and a new design combining features of the 1898 Krag rifle and the 1893 Spanish Mauser was developed.

Design

The new M1901 prototype combined the cock-on-opening bolt, 30" barrel, magazine cutoff, stock and sights of the Krag-Jørgensen with the dual locking lugs, external claw extractor, and staggered-column magazine of the 1893 Mauser. Taking a cue from the Gewehr 98, a large safety lug was added to the side of the bolt behind the extractor, which would engage the receiver bridge and prevent the bolt moving rearwards. The bolt handle was also bent downwards, to make operation of the bolt faster. It fired an entirely new .30 caliber cartridge, which propelled a 220gr round-nosed bullet at 2,300ft/s. The design was unsuccessful, however, and returned to the drawing board for further improvements.

Following then-current trends in service rifles, the barrel was shortened to 24" after it was discovered that a longer barrel offered no appreciable ballistic advantage, and the shorter barrel was lighter and easier to handle. This "short rifle" also eliminated the need of a shorter carbine for mounted troops or cavalry. A spike-type bayonet with storage in the forend of the stock was added to the design, and the new design was officially adopted as the United States Rifle, Caliber .30, Model 1903.

Almost immediately it underwent two important modifications. In 1905, with 80,000 rifles aready produced, then-US President Theodore Roosevelt ordered the spike bayonet redesigned; he believed it was too flimsy for combat. A conventional blade-type bayonet, the M1905, replaced it and all rifles already produced were retrofitted for the new bayonet. The .30-'03 cartridge was also troublesome; the bullet caused excessive wear on the rifling, and the round-nosed bullet was aerodynamically inefficient. A new cartridge, propelling a 150gr spitzer bullet at 2,700 ft/s (820 m/s) with improved propellant and redesigned case was approved in 1906, becoming the ubiquitous .30-'06. All existing rifles were re-chambered and re-sighted for the new cartridge.