Centerfire is a type of ammunition that uses a primer located in the center of the cartridge base. The primer is a small metal cup filled with an impact-sensitive explosive compound. When the firing pin of a gun strikes the primer, it ignites the explosive compound, producing a flash of hot gas that ignites the propellant, propelling the bullet forward. Centerfire ammunition is more reliable, accurate and powerful than rimfire ammunition, making it the most popular choice for handguns and rifles. It is also commonly used in larger caliber weapons, such as shotguns, and is the most common type of ammunition used in modern day hunting and target shooting. Centerfire ammunition offers a great deal of flexibility and control in terms of range, accuracy, and power.

Difference 101