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Gunpowder

Gunpowder, as it came to be known, is a mixture of saltpeter (potassium nitrate), sulfur, and charcoal. Together, these materials will burn rapidly and explode as a propellant.

Is gun powder still used in guns?

Yes, modern guns do use gun powder, but smokeless powder has replaced traditional black powder. Smokeless gun powder (nitrocellulose) is a cleaner burning propellant, with a controlled burn rate, that reduces fouling. Additionally, smokeless powder produces more energy than traditional black powder.