Reloading dies are essential tools used in the process of reloading ammunition. They are designed to shape, size, and prepare cartridge cases for reloading, ensuring that each round is consistent and safe to fire. Typically made from steel or carbide, these dies come in various types, including sizing dies, expanding dies, and seating dies, each serving a specific function in the reloading process. When using reloading dies, a reloader will insert them into a reloading press, which applies the necessary force to manipulate the cartridge cases. Properly adjusted dies help achieve the desired bullet seating depth and neck tension, contributing to improved accuracy and performance of the ammunition.