Full-length die sets for bottleneck cases consist of two dies. The Full-Length (FL) resizing die features a decapping rod assembly with a neck expander (size button) to resize the entire case and remove the spent primer while ensuring the correct neck tension for bullet seating. The seating die (ST) includes a bullet guide, a built-in crimp ring and the proper seating plug to ensure precise bullet placement and a secure crimp. These two dies work together to provide accurate resizing and reliable bullet seating, essential for high-quality reloading.