Swiss inventor of the full metal jacket bullet (1846-1920)
Eduard Alexander Rubin (17 July 1846 – 6 July 1920) was a Swiss mechanical engineer who is most notable for having invented the full metal jacket bullet in 1882. His most famous cartridge was the 7.5×55mm Swiss which was the standard ammunition for the Schmidt–Rubin, K31 and Stgw 57 military rifles. Besides the full metal jacket bullet, Rubin developed the military Schmidt-Rubin rifle (together with Rudolf Schmidt), the Rubin-Fornerod ignition mechanism and the use of TNT and ammonium nitrate to replace gunpowder in artillery shells.
https://en.wikipedia.org/wiki/Eduard_Rubin