Lee Powder Through Expanding Die .45 Colt

The Lee Powder Through Expanding Die .45 Colt is a specialized reloading die engineered to simultaneously expand the case mouth while charging the cartridge with powder. This single-stage die (model 90586) consolidates two operations into one, reducing handling time and improving consistency during high-volume ammunition production for .45 Colt or .454 Casull centerfire cartridges.

The powder-through design requires use with compatible powder delivery systems—specifically a powder funnel adapter, the Lee Auto Disk Powder Measure, or the Pro Auto Disk Powder Measure. This compatibility standard ensures repeatable charge weights and prevents spillage during the expanding operation. The compact die body (3.3 x 1.4 x 4.6 inches, 0.34 lbs) fits standard press mounting systems without requiring extensive tooling modifications. For reloaders working with lever-action rifles, revolvers, or larger-bore handguns chambered in .45 Colt, this die eliminates the separate expanding step, cutting setup time between loading stages.

This die is purpose-built for shooters who reload substantial volumes of .45 Colt ammunition—cowboy action competitors, handloaders who feed lever-action rifles regularly, and precision revolver shooters focused on case prep efficiency. The powder-through expanding die represents the Lee Precision approach to streamlining reloading workflows without sacrificing charge accuracy. Reloaders familiar with Lee's single-stage die ecosystem will recognize the standard mounting interface and integration with their existing powder measure equipment.