RCBS pioneered and developed the 3-Die Set specifically for straight-wall rifle and pistol cases, streamlining the reloading process. The Carbide Sizer Die sizes the case and de-primes it, with the added benefit of a carbide sizer ring that eliminates the need for lubrication. The Expander Die expands the case to the correct diameter and imparts a flare or bell at the case mouth for smooth bullet feeding. Finally, the Seater Die seats the bullet and applies a roll crimp for a secure fit. Ideal for revolver and lever gun owners, this 3-Die Set is perfect for popular revolver cartridges, offering lubrication-free sizing, proper expansion and bullet seating with a reliable crimp.