Further Tests and A Final Decision
In July 1928, the War Department created the Army, Navy, and Marine Corps Semiautomatic Rifle Board to further test and evaluate both existing and newly submitted rifles with an eye toward focusing on standardizing the most serviceable design. Unlike previous boards, this one would continue to function for three years, and would end up undertaking three series of tests. This Board displayed a strong interest in the development of a .30-'06 semiautomatic rifle, but at the same time recognized the potential effectiveness of the .276 round at ranges up to 600 yards and that relatively light weight rifles that could be built around it; the Board remained consistent with the de facto Army policy of favoring adoption of the .276 round. Counting the Pedersen T1E3 rifle (by this time covered by U.S. Patent 1,737,974), seven rifles were submitted for consideration. One of these rifles was John Garand’s gas-operated .276 rifle, the T3, which had a 10-round magazine loaded with a symmetrical en bloc clip.
The conclusion of the tests, held in August 1929, saw the Board rate the T1E3 and the T3 as superior to all the others. Both rifles were found to be subject to excessive malfunctions, but the T3 was rated superior to the T1E3. Specific T1E3 defects were: failure of the breech mechanism to close, misfires, breech mechanism override (failure to feed), and breakage of a crank and a sear bar. The Board recommended manufacturing of 20 T3 rifles for service test, and in addition recommended building a caliber .30-'06 version of the T3 for evaluation.
Cartridge lethality was again investigated by the “Goat Board”, this time with shooting tests on anaesthetized goats and careful measurement of entry and exit velocities. However, the test results again demonstrated no superiority of caliber .30 ammunition at normal combat ranges.
The year 1931 saw testing of the T1E3 and the twenty T3E2 rifles by the Infantry. The Infantry Board rated the T3E2 superior in effective firepower and simplicity of construction (the T3E2 had 60 parts, while the T1E3 had 99 parts). This Board, which three years earlier had recommended adoption of the T1, now favored the T3E2; it continued to favor the .276. However, the Chief of Infantry broke with the Infantry Board and stated a preference for .30 caliber.
The .30-'06 Garand rifle (essentially an enlarged T3E2) was quickly built and, under the confusing designation T1E1, was tested along with the T3E2 and the Pedersen T1E3 during the remainder of 1931. The Semiautomatic Rifle Board now exhibited a notably critical attitude toward the T1E3. The Board found fault with the requirement for lubricated cartridge cases (seemingly regardless of the technical merits of Mr. Pedersen’s case treatment concept), poor trigger pull, and the upward break of the breech mechanism. A more substantive complaint had to do with the complete exposure of the breech mechanism when held open—the Board correctly cited the vulnerability of the rifle to mud and dust while in this condition. The Board also reported slam-fires (the Garand T3E2 was reported to dimple cartridge primers with its firing pin, but did not slam-fire).
In the end, funding issues forced a decision. Faced with the possible loss of funds already authorized by Congress, the Board met for one more time in January 1932 and decided to recommend approval of the T3E2 (the .276 Garand) for limited procurement by the Army and to continue development of the T1E1 (the .30-'06 Garand). With this action, the Pedersen rifle was effectively dropped from consideration. In four more years, almost to the day, an improved version of rifle T1E1 would be adopted as the M1.
As Springfield Armory tooled for and refined the Garand, Pedersen continued to work on another rifle. He developed a .30 caliber model with a conventional gas-trap piston and multi-piece operating rod system. He fought to have it tested by the U.S. Army prior to World War II. At around the same time, serious difficulties were being encountered with the Garand and questions had been raised. Both Pedersen and Melvin M. Johnson, Jr. attempted to capitalize on the troubles. Based on serial numbers, it is thought up to 12 prototype gas-trap Pedersen rifles were made. One example of the model G-Y resides at the Springfield Armory Museum.
Read more about this topic: Pedersen Rifle
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