What is the function of propellant in ammunition?

The function of propellant in ammunition is to provide the energy needed to propel the projectile. Propellant, typically in the form of gunpowder, undergoes a rapid chemical reaction when ignited, producing an expanding gas. This gas generates pressure within the cartridge, which forces the projectile out of the barrel at high speed. The amount and type of propellant directly influence the velocity and distance of the projectile, making it a critical component of ammunition. Understanding this role is essential for anyone handling ammunition, as it highlights the importance of propellant characteristics in achieving optimal performance and safety.