If you’re new to the world of firearms, a key concept to learn is the difference between rimfire and centerfire ammunition. These styles represent the types of primer ignition systems, or what takes place when a gun fires a bullet. Any time you fire a weapon—regardless of the ammo—the primer is struck by the firing pin, causing an explosion that ignites the gunpowder and propels the bullet forward. However, the firing pin can hit the primer in two different ways, which the guide below explores.

Rimfire Ammunition

With rimfire ammo, the firearm’s firing pin strikes the rim, or outer edge, of the cartridge. This ignites the gunpowder to project the bullet down the barrel. Rimfire is typically available in a smaller caliber, such as .22 Long Rifle (LR) or .17 Hornady Magnum Rifle (HMR). This ammunition is usually for small game hunting and target shooting. Because it has less recoil than centerfire ammunition, it’s typically for entry-level practice. Rimfire is also more affordable than centerfire.

Centerfire Ammunition

With centerfire ammunition, the firing pin strikes the center of the cartridge, where the primer is pressed into the casing. There are two styles of ignition systems for centerfire rifles: a boxer primer and Berdan primer. With a boxer primer ignition system, the firing pin strikes the primer and pushes the ignition through a single hole in the center of the cartridge. With the Berdan system, the firing pin strikes the primer against a small metal projection called an anvil, igniting the explosion.

While centerfire ammunition has more recoil, many shooters prefer it for several reasons. For one, it works better for long-range shooting and also supports large game hunting. Centerfire cartridges are also reloadable, bringing down the cost of shooting if you choose this route.

Whether you prefer rimfire or centerfire ammo, get all the practice you need at Shooter’s Firearms & Indoor Range. Located in Monroe County, IL, this one-stop-shop offers a wide range of services for firearm enthusiasts, including weapons sales, classes, and shooting competitions. Explore their full lineup of services online or call (618) 281-6393 to speak with a team member.