12.7×81mmSR

12.7 X 81mm Semi-Rimmed, Breda / Vickers .5"V/565 12.7×81mm 12,7x81mmSR Ho-103 cartridges.jpg Japanese-made 12.7x81mmSR cartridges: from left to right: AP-T (red tracer), AP-T (white tracer), Ma 103 HEI (high-explosive, incendiary), Ma 102 HEI. UK Heavy Machine Gun 1923 Vickers .5V/580 Semi-rimmed, bottlenecked 13.05 mm on 13.80 mm on 18.32 mm on 19.55 mm on 81.2 mm on 107.2 mm on Berdan no gram 36.6 2510 fps 7902 The 12.7×81mmSR cartridge was created by Vickers as an export variant of the cartridge developed for the Vickers .50 machine gun. The major changes were to modify the case from rimless to Semi-Rimmed and reduce the bullet weight from 580 gr on to 565 gr on..5 Vickers Mk I Rimless https://municion.org/producto/5-vickers-mk-i-rimless/ 2024-09-29 Municion Org en History Vickers sold a number of weapons chambered in the cartridge to Italy and Japan, who developed their own weapons that utilized that cartridge.THE .5" VICKERS GUNS AND AMMUNITION https://www.quarryhs.co.uk/Vickers.html 2024-09-29 Wayback Machine en 2022-01-29 https://web.archive.org/web/20220129123928/https://www.quarryhs.co.uk/Vickers.html dead The cartridge was adopted by Italy in 1933 with the Breda-SAFAT and Scotti–Isotta Fraschini Modello 1933 machine guns, which armed most of the aircraft of the Regia Aeronautica from the Ethiopian War to the Second World War. The cartridge remained in production until the 1970s, when the last Breda-SAFAT machine guns, that were in service until the 1970s as reserve weapons of the Italian Air Force, were decommissioned. September 2024 As aircraft of the Corpo Truppe Volontarie and the Fiat CR.32 fighters supplied to the Nationalists during the Spanish Civil War were armed with the Breda-SAFAT, the cartridge was produced in Spain by "Pirotécnica" of Seville. September 2024 Hungary also produced the Reggiane Re.2000 under license which was armed with the Gebauer 1940.M GKM machine gun, which used the cartridge. September 2024 In 1941 Type 1 machine gun variants (Ho-103 in fixed mounts and Ho-104 in flexible mounts) were introduced by Japan as aircraft-mounted heavy machine guns using the cartridge. September 2024 Alternate names 12.7 x 81 SR (v/565) - The Vickers Machine Gun https://vickersmg.blog/the-guns/ammunition/12-7-x-81-sr-v-565/ 2024-09-29 The Vickers Machine Gun en 12.7mm Breda 12.7 x 81 SR 12.7mm Type 1 12.7mm Mod. 36 12.7mm Japanese .5 in. V/565 Vickers-Armstrong Cartridge variants Japanese Explosive Ordinance (Army Ammunition Navy Ammunition) Chapter 4 2 1 Washington, D.C, USA United States Government Printing Office 16 Mar 1953 279 TM 9-1985-5/TO 39B-1A-12 Japanese Ammunition - C.I.AMN. Technical Report 24 2 Khadki, India Chief Inspector of Ammunition, Kirkee 1945 3–4 Japanese Ammunition 1880-1945 vol. 1, Ken Elks, 0955186226 Ball (full metal jacket), marked with a pink or red seal around the casemouth.thumb|12.7 × 81 mm ball Armor piercing (AP) of Italian origin, marked with a black tip.thumb|12.7×81mmSR AP Armour piercing tracer (AP-T) with red tracer, marked with a pink tip and green and white seal around the casemouth.thumb|12.7 × 81 mm HE, AP, tracer AP-T with brighter-burning, longer-lasting red tracer, uncolored tip and black seal around the casemouth. AP-T with white tracer, uncolored tip and green and white seal around the casemouth.thumb|12.7 × 81 mm tracer Fuzed high-explosive incendiary (HEI) of Italian origin, its body painted blue or red. Contained 0.8 g gr of PETN and incendiary composition.thumb|12.7 × 81 mm HE, tracer Ma 103 fuzed HEI, marked with a white seal around the casemouth. Contained 0.8 g gr of RDX and 1.46 g gr incendiary composition. Ma 102 fuzeless HEI, marked with a dark purple seal around the casemouth. Contained 2 g gr of PETN + RDX and 1.46 g gr incendiary composition. See also 12 mm caliber .50 BMG Breda-SAFAT machine gun Ho-103 machine gun References Category:Pistol and rifle cartridges Category:Military cartridges Category:Anti-materiel cartridges