Combustion converts less than 50 % the mass of gunpowder to gas; nearly all of it turns into particulate issue. A number of it's ejected, wasting propelling energy, fouling the air, and generally being a nuisance (gifting away a soldier's posture, producing fog that hinders eyesight, etc.). A number of https://digibookmarks.com/story14839993/the-definitive-guide-to-black-powder