Full-length die sets for bottleneck cases consist of two dies. The Full-Length (FL) resizing die includes a decapping rod assembly with a neck expander (size button), which resizes the entire case and removes the spent primer while ensuring the proper neck tension for bullet seating. The seating die (ST) features a bullet guide, a built-in crimp ring and the correct seating plug, allowing for precise bullet placement and consistent crimping. Together, these dies provide all the necessary tools for resizing and seating, ensuring accurate and reliable reloading results.