30-06-ammo.The .30-06 Springfield cartridge (pronounced “thirty-ought-six” IPA: [ˈθɝɾi ɔt sɪks]), 7.62×63mm in metric notation and called “.30 Gov’t ’06” by Winchester, was introduced to the United States Army in 1906 and later standardized; it remained in use until the late 1970s. The “.30” refers to the caliber of the bullet in inches. The “06” refers to the year the cartridge was adopted, 1906. It replaced the .30-03, 6mm Lee Navy, and .30-40 Krag cartridges. The .30-06 remained the U.S. Army’s primary rifle and machine gun cartridge for nearly 50 years before being replaced by the 7.62×51mm NATO and 5.56×45mm NATO, both of which remain in current U.S. and NATO service. It remains a very popular sporting round, with ammunition produced by all major manufacturers.30-06-ammo
In the early-1890s, the U.S. military adopted the smokeless powder .30-40 Krag rimmed cartridge. The 1894 version of that cartridge used a 220-grain (14 g) round-nose bullet. Around 1901, the U.S. started developing an experimental rimless cartridge for a Mauser action with box magazine. That led to the 1903 .30-03 rimless service round that used the same 220-grain (14 g) round-nose bullet as the Krag. The .30-03 achieved a muzzle velocity of 2,300 ft/s (700 m/s).
Many European militaries at the beginning of the 20th century were adopting lighter-weight (roughly 150-to-200-grain (9.7 to 13.0 g)), higher velocity, service rounds with pointed (spitzer) bullets: France in 1898 (8mm Lebel Balle D spitzer 198 grains (12.8 g) with boat-tail), Germany in 1903 (7.92×57mm Mauser 153 grains (9.9 g) S Patrone), Russia in 1908 (7.62×54mmR Lyokhkaya pulya [light bullet]), and Britain in 1910 (.303 British Mark VII 174 grains (11.3 g)). Consequently, the round-nosed U.S. .30-03 service cartridge was falling behind.30-06 ammo for sale
Cartridge, ball, caliber .30, Model of 1906 (M1906)
For these reasons, the U.S. military developed a new, lighter cartridge in 1906, the .30-06 Springfield, “cartridge, ball, caliber .30, Model of 1906”, or just M1906. The .30-03 case was modified to have a slightly shorter neck to fire a spitzer flat-based 150-grain (9.72 g) bullet that had a ballistic coefficient (G1 BC) of approximately 0.405, a muzzle velocity of 2,700 ft/s (820 m/s), and a muzzle energy of 2,429 ft⋅lbf (3,293 J). The cartridge was loaded with military rifle (MR) 21 propellant, and its maximum range was claimed (falsely) to be 4,700 yd (4,300 m).
The M1903 Springfield rifle, which had been introduced alongside the .30-03 cartridge, was modified to accept the new .30-06 Springfield cartridge. Modifications to the rifle included shortening the barrel at its breech and resizing the chamber, so that the more tapered bullet would not have to jump too far to reach the rifling. Other changes to the rifle included elimination of the troublesome “rod bayonet” of the earlier Springfield rifles.30-06 ammo for sale