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The .276 Pedersen was a shorter, lighter and lower pressure round than the .30-06, which made the design of an autoloading rifle easier than the long, powerful .30-06. The U.S. Army Chief of Staff Gen. Douglas MacArthur rejected the .276 Pedersen Garand in 1932 after verifying that a .30-06 version was feasible. [2]
En-bloc clip loaded with 10 rounds of .276 Pedersen. Image from John Pedersen patent. In February 1926, the new rifle and ammunition were tested in the presence of representatives of both the Army Chief of Infantry and the Chief of Cavalry. The results were “highly favorable” [5] Production was authorized on May 20, 1926 of 20 rifles and 5 ...
After the .276 Garand rifle was selected over the Pedersen rifle, General Douglas MacArthur came out against changing rifle cartridges, since the Army had vast stockpiles of .30–06 ammunition left over from World War I, the .30-06 would have to be retained for machine gun use, and one cartridge simplified wartime logistics.
The .276 Enfield was designed with the intent of being more powerful than the .303 British cartridge used in the Lee–Enfield rifles and to be at least similar in size and performance to other large, powerful early 20th century military rifle cartridges, like the .280 Ross, 7.92×57mm Mauser, .30-06 Springfield and 7.5×55mm Swiss GP11.
.276 Pedersen: 1923 7.218 (.284) 51.38 (2.023) ... Voluntary Industry Performance Standards for Pressure and Velocity of Centerfire Rifle Ammunition for the Use of ...
The ammunition he developed, the .276 Pedersen (7×51mm) waxed round was an experimental 7 mm cartridge developed for the U.S. Army and used in the Pedersen rifle. [2] Pedersen was issued 69 patents listing his home as Wyoming, and others listing Colorado and New York State. [citation needed]
.276 Enfield United Kingdom: 1912 Pattern 1914 Enfield: Royal Small Arms Factory.303 British United Kingdom: 1914 Pedersen rifle: John Pedersen.276 Pedersen United States: 1920s PTR 91F: PTR-91 Industries, Inc. 7.62×51mm NATO United States: 2000 Remington–Keene rifle: Remington Arms.45-70 United States: 1878 Remington M1867: Remington Arms ...
The Autorifle Model 1929, in .276 Pedersen, was tested in a competition with the rifles by J.D. Pedersen (delayed blowback) and John C. Garand (gas-operated), which culminated in the adoption of the M1 Garand. On the positive side, the Autorifle action avoided the complexity of recoil-operated and gas-operated actions.