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.
i don't know