The Lee 45 Colt Breech Lock Carbide Micrometer 4-Die Set (Lee Precision part no. 91939) is built for reloaders running a Breech Lock Quick Change press who want to switch calibers fast without losing die settings. The set includes a Carbide Full Length Sizing Die, a Powder Through Expanding Die, a Micrometer Bullet Seating Die, and a Carbide Factory Crimp Die, along with a Universal Shell Holder, a powder dipper, and instructions with load data. Color-coded quick change bushings make it easy to identify each die at a glance, and because the sizing die uses carbide, it handles mixed range brass without the need for case lubrication. This same set can also be used to load 454 Casull, with load data available separately.

Key Specifications

• Includes a Carbide Full Length Sizing Die that sizes mixed range brass without case lube.
• Includes a Powder Through Expanding Die for case mouth flaring.
• Includes a Micrometer Bullet Seating Die for adjustable seating depth.
• Includes a Carbide Factory Crimp Die for a consistent case-mouth crimp.
• Comes with color-coded quick change bushings for fast die identification.
• Includes a Universal Shell Holder for use across calibers.
• Includes a powder dipper and printed load data.

Frequently Asked Questions

What does the Breech Lock name mean for this set? The dies use quick-change bushings designed for Lee’s Breech Lock Quick Change press feature, letting you swap dies without resetting them each time.

Can this set load 454 Casull too? Yes, this set can also be used to load 454 Casull, with load data available separately from Modern Reloading or a 454 Casull instruction sheet.

Do I need to lubricate cases with this sizing die? No, the carbide sizing die handles mixed range brass without requiring case lubrication.

Buy the Lee 45 Colt Breech Lock Carbide Micrometer 4-Die Set

Order this set from Lee Precision in our gunsmithing tools lineup for fast, no-lube 45 Colt reloading. Order it from our Lubbock, Texas gun shop for fast, insured shipping.