Lee Precision Load Master Progressive Press Kit

Introduction

The Lee Load Master Progressive Press is designed for efficient reloading of both rifle and handgun cartridges. Its robust construction provides ample clearance, even for large magnum rifle cases. This versatile press can operate as an automatic indexing progressive press for high-volume production or as a single-stage press for precise, individual operations. It features five stations that accommodate most popular reloading dies, which are held by a detachable turret. This design allows for quick die changes without requiring readjustment, enhancing user convenience and efficiency.

An image showing the Lee Precision Load Master Progressive Press Kit, featuring its red cast aluminum frame, powder measure, and operating handle.

Safety Information

Reloading ammunition involves handling potentially hazardous materials. Adherence to safety guidelines is paramount to prevent injury or property damage. Always read and understand all instructions before operating the press.

• Always wear appropriate eye protection during all reloading operations.
• Ensure adequate ventilation in your reloading area to disperse fumes from primers and powder.
• Store primers and powder in their original containers in a cool, dry, and secure location, away from heat sources and open flames.
• Keep all reloading components and equipment out of reach of children and unauthorized individuals.
• Never exceed recommended powder charges. Refer to reliable reloading manuals for load data.
• Inspect all components (cases, primers, powder, bullets) for defects before use.
• This product may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.

Package Contents

Verify that all the following components are included in your Lee Load Master Progressive Press Kit:

• Lee Load Master Progressive Press (Main Unit)
• .380 Auto Three-Piece Die Set
• Auto Drum Powder Measure (with large and small drums)
• Small Case Feeder and Tubes
• Small Primer Feed System (with one new style primer tray)
• Primer Blast Shield and Mounting Screws
• Lee #4S Shell Plate (suitable for .380 Auto, .222, .223, .300 BLK, and similar cases)
• Spare Plastic Indexer Cog/Gear
• One Lee Red Bin and Attaching Hardware (Akro-Mils brand)
• Instruction Manuals for all included components

Setup

Proper setup is crucial for safe and efficient operation. Follow these general steps for initial assembly and configuration:

1. Mounting the Press: Securely mount the press to a sturdy workbench using the three designated mounting holes. Ensure the press is stable and does not wobble during operation.
2. Installing Dies: Insert the appropriate dies into the detachable turret. The five stations allow for a complete reloading sequence. Refer to the individual die instructions for specific setup and adjustment procedures.
3. Powder Measure Installation: Attach the Auto Drum Powder Measure to the designated station on the press. Ensure it is securely fastened and calibrated for the desired powder charge.
4. Primer System Setup: Install the Small Primer Feed System. Load the primer tray with primers, ensuring they are oriented correctly. Connect the primer blast shield.
5. Shell Plate Installation: Install the Lee #4S Shell Plate onto the press. This plate is specific to the .380 Auto caliber and other compatible cases.
6. Case Feeder Assembly: Assemble and attach the small case feeder and tubes to the press.
7. Initial Adjustments: Perform initial adjustments for each die according to the instructions provided with the die set. This includes sizing, decapping, powder charging, bullet seating, and crimping.

Always perform a series of test cycles with inert components (no powder or primers) to ensure all mechanisms are functioning correctly and adjustments are precise before beginning live reloading.

Operating Instructions

The Lee Load Master can be operated in two primary modes: automatic indexing progressive or single-stage.

Progressive Operation (Automatic Indexing)

This mode is ideal for high-volume production, completing a finished cartridge with each pull of the handle.

1. Ensure all dies are correctly installed and adjusted in the turret.
2. Load the case feeder with empty, clean cases.
3. Load the primer feed system with appropriate primers.
4. Place bullets into the bullet feeder (if applicable) or manually place them at the seating station.
5. With each full stroke of the operating handle (down and up), the shell plate will automatically index to the next station, and a new cartridge will progress through the reloading stages.
6. Monitor each stage for proper function, especially powder drops and primer seating.
7. Collect finished cartridges from the output bin.

Single-Stage Operation

For precise adjustments or specific operations, the press can be used as a single-stage unit by disengaging the automatic indexing mechanism (refer to your specific manual for instructions on disengaging the indexer).

• Manually place a case into the desired station.
• Perform the specific operation (e.g., sizing, decapping, priming, powder charging, bullet seating, crimping) by cycling the handle.
• Remove the case and manually move it to the next station or perform another operation as needed.

Always verify the quality of your reloaded ammunition by checking overall length, crimp, and visual inspection for any anomalies.

Maintenance

Regular maintenance ensures the longevity and reliable performance of your Lee Load Master press.

• Cleaning: After each reloading session, clean the press to remove powder residue, primer dust, and any lubricant buildup. Use a soft cloth and a suitable cleaning solution. Pay particular attention to the shell plate, ram, and die stations.
• Lubrication: Apply a light coat of machine oil to moving parts, such as the ram and linkage pins, to ensure smooth operation. Avoid over-lubrication, especially near powder and primer areas.
• Spent Primer Collection: Regularly empty the spent primer collection system to prevent buildup and ensure proper function.
• Inspection: Periodically inspect all components for wear, damage, or loose fasteners. Tighten any loose screws or bolts. Check the plastic indexer cog/gear for wear and replace if necessary (a spare is included).
• Storage: When not in use, store the press in a clean, dry environment to prevent rust and corrosion.

Troubleshooting

This section addresses common issues encountered during operation. For detailed troubleshooting, refer to the comprehensive manual included with your press.

If you encounter issues not covered here or require replacement parts, it is recommended to contact Lee Precision customer support directly. Please note that some older models may have limited parts availability.

Specifications

Warranty and Support

Lee Precision products are manufactured to high standards and are typically backed by a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation included with your product or visit the official Lee Precision website.

For technical assistance, troubleshooting beyond this manual, or to inquire about replacement parts, please contact Lee Precision customer support directly. Providing your model number (90937) and a detailed description of your issue will help expedite support.

Note: Product specifications and included components are subject to change by the manufacturer without prior notice.