Lee Precision 90620 Powder Through Expanding Die 40 S&W 10mm Auto

The Lee Precision 90620 Powder Through Expanding Die streamlines the reloading process for 40 S&W and 10mm Auto cartridges by combining case expansion and powder charging in a single operation. This dual-function die eliminates an entire step from the traditional reloading sequence while maintaining consistent neck tension and powder charges.

What Makes This Different

Unlike standard expanding dies that require separate powder charging, this powder-through design features an internal funnel system that meters powder directly into the case during the expansion stroke. The precision-machined expander plug creates uniform case mouth flare while the integrated powder drop tube ensures consistent charges without bridging or spillage. This design reduces handling time per case by approximately 30% compared to conventional multi-step processes.

Key Features

• Powder-through design combines case expansion and powder charging operations
• Precision ground expander plug sized specifically for .400" diameter bullets
• Internal funnel system prevents powder bridging and spillage
• Compatible with Lee Auto-Drum and Perfect Powder Measure systems
• Heat-treated steel construction with corrosion-resistant finish
• Standard 7/8"-14 threading fits most progressive and single-stage presses
• Includes detailed setup instructions and powder drop adjustment guide

This die excels in high-volume reloading scenarios where consistency and speed matter most. Competition shooters benefit from the uniform case preparation that promotes consistent bullet seating depth and neck tension. The integrated powder charging system maintains charge weights within ±0.1 grains when properly adjusted, meeting the accuracy demands of precision shooting applications. Law enforcement agencies appreciate the time savings during bulk ammunition preparation.

Technical Specs

• Caliber compatibility: 40 S&W and 10mm Auto
• Thread specification: 7/8"-14 TPI standard
• Expander plug diameter: .400" nominal
• Overall length: 3.25 inches
• Body material: Heat-treated alloy steel
• Finish: Black oxide coating
• Compatible with Lee powder measuring systems
• Made in USA with lifetime warranty

Reloaders who demand both speed and precision find this die delivers measurable improvements in workflow efficiency. The robust construction handles thousands of cycles while maintaining dimensional accuracy, making it a sound investment for serious handloaders.