The ammunition is classified as rimfire or centerfire based on where the primer is located.
Centerfire
Primer is located in the center of the base.
Centerfire - used for rifles, shotguns, and handguns.
Rimfire
Primer is contained in the rim of the ammunition
Limited to low pressure
.22 caliber loads are most common
Casings cannot be reloaded
Magnum loads
Magnum loads have more powder and/or shot than target or field loads. The same ammunition can be filled with several power charges. The boxes may be marked target, field or magnum load.
