Centerfire cartridges are a type of ammunition where the primer is located in the center of the cartridge case's base. This design allows for reliable ignition of the gunpowder when struck by the firing pin of a firearm. Centerfire cartridges are commonly used in rifles and handguns, making them popular among hunters and sport shooters. These cartridges come in various calibers and can be reloaded, which means spent cases can be reused by replacing the primer, powder, and bullet. This feature makes centerfire cartridges economical and environmentally friendly. Common examples include 9mm, .45 ACP, and .308 Winchester.