Full-length die sets for bottleneck cases include two essential dies. The Full-Length (FL) resizing die features a decapping rod assembly with a neck expander (size button), which resizes the entire case and ensures the correct neck tension for proper bullet seating. The seating die (ST) is equipped with a bullet guide, built-in crimp ring and the appropriate seating plug to accurately seat the bullet and apply a consistent crimp. Together, these dies offer a comprehensive solution for resizing and seating bullets with precision and reliability.