Lee Precision 90586 Powder Through Expanding Die 45 Colt/454 Casull

The Lee Precision 90586 Powder Through Expanding Die streamlines the reloading process for 45 Colt and 454 Casull cartridges by combining case mouth expansion and powder charging in a single operation. This dual-function die eliminates an extra step from the reloading sequence while maintaining consistent case preparation.

What Makes This Different

Unlike standard expanding dies that require separate powder charging, this powder-through design features an integrated funnel system that meters powder directly into the case during expansion. The die body incorporates Lee's precision-machined expander plug with a hollow center channel, allowing powder to flow through while expanding the case mouth to the exact diameter needed for bullet seating. This combination reduces handling time and maintains more consistent powder charges compared to separate operations.

Key Features

• Powder-through design combines case expansion and powder charging in one step
• Precision-machined steel construction with hardened expander plug
• Compatible with Lee Auto-Disk and Perfect Powder measures
• Adjustable expander plug for optimal case mouth tension
• Standard 7/8-14 threading fits most reloading presses
• Dual caliber compatibility for both 45 Colt and 454 Casull cases
• Includes lock ring for consistent die positioning

This die performs reliably across different case manufacturers and brass conditions, maintaining consistent expansion diameter regardless of case wall thickness variations. The integrated powder funnel design prevents powder spillage while the adjustable expander ensures proper bullet grip without overworking the brass. Reloaders report smooth operation with both light target loads and heavy hunting charges, making it suitable for cowboy action shooting, hunting applications, and general target practice.

Technical Specs

• Caliber: 45 Colt (LC) and 454 Casull
• Thread: 7/8-14 TPI standard die threading
• Material: Heat-treated steel construction
• Expander: Adjustable hardened steel plug
• Compatibility: Lee powder measures and most press brands
• Includes: Die body, expander plug, lock ring
• Country of Origin: United States

The Lee 90586 represents solid engineering focused on efficiency rather than complexity. Experienced reloaders appreciate the time savings, while beginners benefit from the simplified process that reduces opportunities for error during case preparation.