Lee Precision 91557 Pro 4000 Press Kit 38 Special/357 Mag

The Lee Precision Pro 4000 Press Kit is a true progressive reloading press that delivers production-level output without the premium price tag of high-end equipment. Built for handloaders who want to step up from single-stage presses and load rifle and pistol rounds efficiently, this 38 Special/357 Mag kit arrives with everything needed to begin reloading immediately—carbide dies, shell plate, Universal Case Feeder, Auto-Drum Powder Measure, and Safety Prime system included. The modular design lets you run as automated or as hands-on as your workflow requires, with no finicky adjustments needed to switch between operation modes.

Cartridge changeover happens in seconds thanks to the Breech Lock quick-change system, which works across all four press stations without readjustment. Primer size changes are equally fast—swap the appropriate priming arm and you're ready to go. The press features an exclusive auto case placer and through-the-ram primer disposal with a built-in tube for safe, tidy spent primer collection. An ergonomic wood-grip roller handle reduces fatigue during long reloading sessions, and the kit includes four colored spline drive breech lock bushings, both large and small priming arms, and a hex wrench with a built-in storage rack for your tools—details that would cost extra on other platforms.

Once you set your dies into the Breech Lock bushings for your load, the system locks them in place for instant, repeatable changeover. This is a press built for reloaders who want speed and consistency without sacrificing control or dealing with constant calibration. If you're loading 38 Special and 357 Mag in volume and tired of the limitations of single-stage presses, the Pro 4000 bridges the gap between hobby reloading and serious production.

Key Features

• Progressive press design for faster, higher-volume reloading
• Breech Lock quick-change system—all four stations, no adjustments
• Includes Lee 3 die carbide set and shell plate for 38 Special/357 Mag
• Universal Case Feeder for automated case positioning
• Auto-Drum Powder Measure for consistent powder charges
• Safety Prime system for reliable primer seating
• Modular construction—run fully automated or add manual control as needed
• Through-ram primer disposal with built-in collection tube
• Ergonomic wood-grip roller handle included
• Cartridge and primer size changeover in seconds
• Includes four colored breech lock bushings, both priming arms, hex wrench, and tool storage rack

Specifications

Frequently Asked Questions

What's included in the Pro 4000 kit for 38 Special and 357 Mag?

The kit comes complete with a Lee 3 die carbide set, shell plate, Universal Case Feeder, Auto-Drum Powder Measure, Safety Prime system, four colored breech lock bushings, both large and small priming arms, an ergonomic wood-grip roller handle, a hex wrench, and a built-in tool storage rack. You can begin reloading 38 Special and 357 Mag right out of the box.

How fast can I change calibers or primer sizes?

Cartridge changeover happens in seconds using the Breech Lock quick-change system across all four press stations—no adjustments required. To change primer sizes, simply swap the appropriate priming arm. Once your dies are set in the Breech Lock bushings, the system locks them in place for instant, repeatable changeover.

Can I run this press fully automated or do I have to use all the automatic features?

The modular construction allows you to run as much or as little automation as you prefer, with no adjustments needed to switch between modes. You can use the Universal Case Feeder and Auto-Drum Powder Measure, or operate more manually—it's entirely up to your workflow.

Do I need to make any initial adjustments to use this press?

You will need to make an initial die adjustment into the Breech Lock bushings when setting up for your load. Once set, the Breech Lock system allows for instant, no-adjustment changeover every time you reload.