What cartridge was developed in 1910 and is currently used in the M2 machine gun?
.50 BMG The .50 Browning Machine Gun (.50 BMG, 12.7×99mm NATO and designated as the 50 Browning by the C.I.P.) is a cartridge developed for the Browning .50 caliber machine gun in the late 1910s. Entering service officially in 1921, the round is based on a greatly scaled-up .30-06 cartridge. Under STANAG 4383, it is a standard cartridge for NATO forces as well as many non-NATO countries. The cartridge itself has been made in many variants: multiple generations of regular ball, tracer, armor-piercing (AP), incendiary, and saboted sub-caliber rounds. The rounds intended for machine guns are linked using metallic links.
152 mm howitzer M1910 The 152 mm howitzer Model 1910 Schneider or, more properly, "6 dm polevaja gaubitsa sistemy Schneidera" as it was designated in Tsarist times, was a French howitzer designed by Schneider et Cie. It was used by the Russian Empire and the Soviet Union during World War I, the Russo-Polish War and the Russian Civil War. Finland captured nine during the Finnish Civil War, but didn't use them during that conflict. They did see combat during the Winter War and the Continuation War.