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 proper neck tension for bullet seating. The seating die (ST) features a bullet guide, a built-in crimp ring and the appropriate seating plug, allowing for precise bullet placement and a consistent crimp. These dies work together to provide a reliable and effective solution for resizing and seating, ensuring consistent, high-quality reloading results.