Georgy Semyonovich Shpagin worked with Vasily Degtyaryov on a gun that fired what size cartridge?
Georgy Shpagin: Georgy Semyonovich Shpagin (Russian: Георгий Семёнович Шпагин ; April 17, 1897 – February 6, 1952) was a Russian weapons designer. DShK: The DShK 1938 (ДШК, for Дегтярёва-Шпагина Крупнокалиберный, "Degtyaryova-Shpagina Krupnokaliberny", "Degtyaryov-Shpagin Large-Calibre") is a Soviet heavy machine gun firing the 12.7×108mm cartridge.
i don't know