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The .50 BMG (.50 Browning Machine Gun), also known as 12.7×99mm NATO, and designated as the 50 Browning by the C.I.P., [1] is a .50 in (12.7 mm) caliber cartridge developed for the M2 Browning heavy machine gun in the late 1910s, entering official service in 1921.
In foreign use the AN/M2 is often just referred to as the M2 Browning. In Sweden it was re-designated 12,7 mm automatkanon m/45 (short 12.7mm akan m/45) meaning 12.7 mm autocannon m/45. [82] The Swedish Air Force used a different designation system which recognized the incendiary rounds as grenades, thus it was called autocannon. [82]
13 mm» This is a list of firearm cartridges which have bullets in the 12 millimetres (0.47 in) to 12.99 millimetres (0.511 in) caliber range. Length refers to the cartridge case length.
A .50 caliber handgun is a handgun firing a bullet measuring approximately 0.5 inches (12.7 mm) in diameter intended with the task of penetration. Historically, many black powder pistols fired bullets with diameters well above a half inch.
The Mk 211 is a very popular .50 caliber sniper round used in the Barrett M82 rifle and other .50 BMG rifles. [5] It is also often used in heavy machine guns such as the M2 Browning, but not the M85. Due to its popularity, several U.S. arms manufacturers produce the round under license from NAMMO Raufoss AS. [6]
The 12.7 × 108 mm has 22.72 ml (350 grains) H 2 O cartridge case capacity. 12.7 × 108 mm maximum cartridge dimensions. [citation needed] All sizes in millimeters (mm). Americans define the shoulder angle at alpha/2 ≈ 18.16 degrees. According to guidelines the 12.7 × 108 mm case can handle up to 360 MPa (52,213 psi) piezo pressure.
The weapon itself was largely based on the American .50-caliber (12.7 mm) M2 Browning heavy machine gun, while the design of its ammunition was initially based on various Italian Breda-SAFAT 12.7 mm rounds. Japanese-designed and produced rounds eventually largely replaced these imported rounds. [1]
With normal bullet weights between 300 and 400 grains (19 and 26 g), overall cartridge length shorter than that of an AR-15 magazine well, and holding to pressures of 33,000 psi limited by the AR bolt strength system, [2] the .50 Beowulf is best described as a low-velocity, heavy caliber, making its ballistics roughly equivalent to those of ...