Die sets for straight wall cases consist of three dies, each serving a specific function, as it is not possible to perform full-length resizing and neck expansion in a single operation. The full-length (FL) resizing die features a decapping rod assembly, which removes the spent primer from the case. The expander die (EXP) includes a neck-expanding plug that ensures the case neck is properly sized for bullet fit. Finally, the seating die (ST) is equipped with a bullet guide, a built-in crimp ring and the correct seating plug to ensure precise bullet placement and secure seating. This three-die system is essential for achieving consistent and reliable reloading for straight wall cases.