What is the main difference between centerfire and rimfire ammunition?

The main difference between centerfire and rimfire ammunition lies in how the primer is ignited to ignite the gunpowder inside the cartridge.

In centerfire ammunition, the primer is located in the center of the base of the cartridge case. When the firing pin strikes the center of the base, it initiates a spark that sets off the gunpowder and fires the bullet. Centerfire ammunition is typically more reliable and powerful than rimfire ammunition, making it suitable for larger calibers and high-pressure cartridges.

On the other hand, in rimfire ammunition, the primer is located within the rim of the cartridge case. When the firing pin strikes the outer edge of the base, it crushes the rim and ignites the primer, setting off the gunpowder and firing the bullet. Rimfire ammunition is typically used in smaller calibers and lower-pressure cartridges, and is often associated with more affordable and less powerful ammunition options.

Overall, centerfire ammunition is generally considered more reliable, versatile, and powerful than rimfire ammunition, making it preferred for larger calibers and more demanding shooting applications.