The difference in the ignition of a rimfire and centerfire cartridge is based on what?

The correct answer is based on the location of the primer. In firearms, the ignition system of ammunition is a fundamental aspect that distinguishes between rimfire and centerfire cartridges. In rimfire cartridges, the primer is located within the rim of the cartridge case. When the firing pin strikes the rim, it crushes the primer, igniting the powder inside the cartridge. This design is typically simpler and less expensive, which is why rimfire ammunition is often used for small caliber firearms like .22 caliber rifles.

Conversely, centerfire cartridges have their primers located in the center of the cartridge base. The firing pin strikes the center of the primer, igniting it and subsequently the gunpowder. This design allows for the use of replaceable primers, making centerfire ammunition more versatile and suitable for larger calibers typically used in more powerful firearms.

Understanding this distinction is crucial not only for identifying the type of ammunition but also for recognizing the different mechanical operations and safety considerations involved when handling firearms that use these cartridges.