RCBS Legacy 3-Die Roll Crimp Set Features The RCBS Legacy 3-Die Roll Crimp Set starts with a steel Sizer Die that sizes the case back to proper dimensions and de-primes it in a single step preparing brass for the next stage of reloading. Cases must be lubricated before sizing to keep the die running smoothly and to prevent sticking in the chamber. The Expander Die then opens the case mouth to the correct diameter to accept the bullet while also imparting a case mouth flare that helps the bullet seat straight and feed properly. Together these first two dies handle all the case preparation work needed before a bullet ever touches the brass. The Seater Die finishes the process by seating the bullet to the proper depth and applying a roll crimp which holds the bullet firmly in place under the pressure generated by black powder cartridges. This roll crimp is particularly important for straight-wall black powder rounds like the .45-110-2 7/8 Sharps where a secure crimp helps maintain consistent pressure and reliable ignition. As part of the Legacy series this set is purpose built for shooters running original or reproduction black powder rifles rather than modern smokeless designs. The RCBS Legacy 3-Die Roll Crimp Set is available for sale at GrabAGun for black powder cartridge reloaders. RCBS Legacy 3-Die Roll Crimp Set Specifications Manufacturer: RCBS Model: Legacy 3-Die Roll Crimp Set Caliber: .45-110-2 7/8 Sharps Type: Rifle Die Set Material: Steel Available At: GrabAGun