What does the power charge do when ignited?

When the power charge is ignited, it serves the critical role of propelling the bullet through the barrel of a firearm. The power charge, commonly referred to as the gunpowder or propellant, undergoes a rapid combustion process when ignited by the primer. This combustion produces a significant volume of gas that expands rapidly, generating pressure within the cartridge. This increased pressure forces the bullet out of the cartridge case and down the barrel at high speed.

This process is foundational to the operation of firearms. The energy released by the ignited power charge is what results in the bullet's motion, allowing it to travel toward its intended target. Understanding this concept is vital for anyone studying firearms, as it encompasses the basic mechanics of how a firearm functions when fired.