Answer :
The primary difference between centerfire and rimfire ammunition lies in the placement of the primer: centerfire has it at the base center and is reloadable, while rimfire has it in the rim and is not reloadable.
The main difference between centerfire and rimfire ammunition is the location of the primer that ignites the gunpowder. In centerfire ammunition, the primer is placed in the center of the casing's base. This type allows for higher pressure loads and is typically used for rifles and handguns. Centerfire cartridges can also be reloaded as the spent primer can be removed and replaced. Conversely, rimfire ammunition has the primer located in the rim of the casing, which is crushed by the firing pin to ignite the powder. Rimfire cartridges are generally limited to low pressure loads and are not reloadable because the casing is deformed upon firing.