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The long action of the M24 is designed for full-length cartridges up to 3.340 inches (84.84 mm) in overall length, such as the .30-06 Springfield, and magnum cartridges such as the 7 mm Remington Magnum and .300 Winchester Magnum, but shorter cartridges such as the 7.62×51mm NATO (the military version of the .308 Winchester) can also be used. [1]
The M40 was initially successful due to operational similarities to the familiar M27 and ready availability from the U.S. military; however, in 1995, a USFS gunner was killed by shrapnel after a low-level premature warhead detonation inside an M40 barrel. The accident was attributed to an undiscovered hairline crack in the projectile's base plate.
Both the U.S. Army's M24 Sniper Weapon System and U.S. Marine Corps' M40 sniper rifles are built from the Remington Model 700 rifle with different degrees of modification, the main difference being the custom fitted heavy contour barrel and action length. The M24 utilizes the long action and the M40 employs the short action bolt-face, as the ...
Its prototype designation was the T38, but this was changed to the M40 in March 1945. [ citation needed ] A single pilot vehicle was used in the European Theatre in 1945 by the 991st Field Artillery Battalion , along with a related 8-inch howitzer motor carriage T89, (later re-designated the M43 howitzer motor carriage ) which was sometimes ...
The M24 SWS has the "long action" bolt version of the Remington 700 receiver but is chambered for the 7.62×51mm NATO "short action" cartridge that has an overall length of 2.750 inches (69.85 mm). The "long action" allows the rifle to be re-configured for dimensionally larger cartridges up to 3.340 inches (84.84 mm) in overall length.
The 20 mm m/40 followed the same pattern of long-recoil operation as the 25 mm and 40 mm guns. It was chambered for a unique and quite powerful 20×145R cartridge, and could fire at 360 rpm. It was chambered for a unique and quite powerful 20×145R cartridge, and could fire at 360 rpm.