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 case and removes the spent primer while ensuring the proper neck tension for bullet seating. The seating die (ST) features a bullet guide, built-in crimp ring and the appropriate seating plug, providing precise bullet placement and a secure crimp. These dies work together to offer reliable and accurate resizing and bullet seating, ensuring high-performance reloading results.