To load a percussion cap gun, you pour gunpowder into your breech, stuff the projectile in on top of it, and spot a mercuric fulminate cap in addition to a small nipple.1 correction, the Hiram Maxim who invented the Maxim machine gun is the FATHER on the Hiram Maxim who invented the silencer. I've heard it explained that Maxim Jr. hoped to forestal… Read More