Question: Georgy Semyonovich Shpagin worked with Vasily Degtyaryov on a gun that fired what size cartridge?
Sentence (from "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.
Relevant evidence: Yes