What type of ammunition is generally reloadable?

Centerfire ammunition is generally considered reloadable due to its design and construction. The casing of centerfire cartridges is made from materials that can withstand the pressure generated when the cartridge is fired, allowing them to be re-formed and reused after firing. Reloading involves cleaning the spent casing, replacing the primer, and adding new gunpowder and projectiles.

In contrast, rimfire ammunition is not designed for reloading. The rimfire cartridges have their primer material integrated into the rim of the case and are typically made of softer materials, making them unsuitable for the reloading process. The one-time-use design of rimfire ammo limits its lifecycle compared to the more durable centerfire cartridges, which can handle the stresses of being reloaded multiple times.