What is the primary distinction between centerfire and rimfire ammunition?

The primary distinction between centerfire and rimfire ammunition lies in the location of the primer. In rimfire ammunition, the primer is contained within the rim of the cartridge case. This design allows the firing pin to strike the rim, igniting the primer and firing the round. Rimfire cartridges are typically cost-effective and often used for smaller caliber rounds, such as .22 LR.

In contrast, centerfire ammunition has its primer located in the center of the cartridge base. This design offers greater reliability and allows for the use of higher pressures, making centerfire ammunition suitable for a wide range of calibers, including those used in handguns and rifles.

Understanding this distinction is crucial for hunters and shooters when selecting ammunition for specific firearms, as it impacts functionality, safety, and performance in the field.