Rcbs 1776 Features The RCBS 1776 Roll Crimp 3-Die Set is engineered specifically for loading straight-walled .45-70 Government cartridges with a bullet diameter of .458 inches. The steel Sizer Die returns fired brass to proper dimensions and de-primes the case in one step though cases must be lubricated before running them through the die. The Expander Die then opens the case mouth to the correct diameter and imparts a flare that eases bullet seating and reduces the chance of shaving lead or copper during the loading process. Finally the Seater Die seats the bullet to the proper depth and applies a secure roll crimp which is essential for tubular magazine rifles chambered in .45-70. This limited-edition set ships in a commemorative wooden box featuring special 250th anniversary logos honoring calibers that have served in America s military rifles and pistols over the last 250 years. The dies themselves are still packaged in RCBS s conventional plastic die box which nests inside the wooden box for long-term storage of bullets tools or other reloading gear. This combination gives reloaders both a functional precision die set and a keepsake piece worth displaying on the bench. For shooters and collectors who want proven RCBS engineering wrapped in a piece of commemorative history this 1776 Roll Crimp set is a standout addition to any reloading setup. Rcbs 1776 Specifications Manufacturer: RCBS Model: 1776 Caliber: .45-70 Gov Reloading Diameter: .458 Die Type: Roll Crimp In Set: 3 Gun Type: Rifle Case: Wooden Presentation Box with RCBS Heritage Graphics Available At: GrabAGun