The Redding .45 Colt/.454 Casull Competition Seating Die (Redding part no. 55191) steps up bullet seating for .45 Colt/.454 Casull with a micrometer head calibrated in .001-inch increments and a floating alignment sleeve that fully supports the case and bullet before seating begins. That sleeve is what separates it from a standard seating die: because the case and bullet are held in alignment throughout the stroke, the seating operation itself introduces essentially no runout. For competition and precision handloaders chasing every last bit of concentricity, that difference shows up on target.

Key Specifications

• Micrometer-adjustable seating depth calibrated in .001-inch increments for precise, repeatable adjustment.
• Floating alignment sleeve fully supports the case and bullet before seating begins to reduce runout.
• Precision-ground seating stem matched closely to bullet diameter for consistent, non-marring contact.
• Concentricity-focused design keeps case and bullet aligned throughout the stroke, unlike a standard seater.
• Sized for .45 Colt/.454 Casull matched to this cartridge’s case and bullet dimensions.

Frequently Asked Questions

How is this different from a standard bullet seating die? A standard seater lacks the floating alignment sleeve; this die fully supports the case and bullet during seating, which is what reduces induced runout.

How precise is the seating depth adjustment? The micrometer head is calibrated in .001-inch increments for fine, repeatable seating depth changes.

Buy the Redding .45 Colt/.454 Casull Competition Seating Die

Order the Redding .45 Colt/.454 Casull Competition Seating Die from our Lubbock, Texas gun shop for fast, insured shipping and chase tighter groups with your .45 Colt/.454 Casull handloads. See the rest of Redding‘s reloading dies for sizing dies to complete the setup.