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The 12.7×108mm cartridge is a heavy machine gun and anti-materiel rifle cartridge used by the former Soviet Union, the former Warsaw Pact, modern Russia, and other countries. It is used in the same roles as the NATO .50 BMG (12.7×99mm NATO) cartridge. The two differ in bullet shape and weight, and the casing of the 12.7×108mm is slightly longer and thicker, allowing it to hold slightly more of a different type of powder. The 12.7×108mm can be used to engage a wide variety of targets on the battlefield, and will destroy unarmored vehicles, penetrate lightly armored vehicles and damage external ancillary equipment (i.e.: searchlights, radar, transmitters, vision blocks, engine compartment covers) on heavily armored vehicles such as tanks.〔(Technical Intelligence Bulletins May - June 2003 )〕 Armor piercing .50 cal ammunition will penetrate around 25 mm of armor. Normal full metal jacket .50 cal ammunition will only dimple tank armor, causing no damage. In the Finnish Defence Forces, the NSV chambered in 12.7×108 is used primarily in an anti-aircraft role by all branches.〔(Puolustusvoimat: Kalustoesittely )〕 ==Cartridge dimensions== The 12.7×108mm has 22.72 ml (350 grains) H2O cartridge case capacity. 400px 12.7×108 maximum cartridge dimensions. All sizes in millimetres (mm). Americans would define the shoulder angle at alpha/2 ≈ 18.16 degrees. According to guidelines the 12.7×108mm case can handle up to 360 MPa (52,213 psi) piezo pressure. In C.I.P. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum CIP pressure to certify for sale to consumers. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「12.7×108mm」の詳細全文を読む スポンサード リンク
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