The _______ explodes and ignites the powder.

The primer is the component that explodes and ignites the powder in a cartridge. When the firing pin strikes the primer, it creates a small explosion that ignites the gunpowder inside the cartridge case. This combustion of the powder generates rapidly expanding gases, which then propel the bullet down the barrel and out of the firearm.

Understanding the function of the primer is crucial for safe handling and operation of firearms. The other components, such as the case, powder, and bullet, play different roles in the ammunition assembly. The case holds everything together, the powder acts as the propellant once ignited, and the bullet is the projectile that is fired. Therefore, recognizing the specific role of the primer in initiating the firing sequence is essential for anyone studying firearms and safety in hunting situations.