Introduction
This manual provides essential instructions for the proper use and maintenance of your Lee Precision 90480 Undersize Mandrel .3035. This specialized tool is designed to achieve a tighter bullet grip within cases when used with a Lee Collet Die.
The standard collet die provides a light press fit with cases of average hardness. If a tighter bullet grip is desired, this .3035 inch undersized mandrel can be used. It is compatible with various calibers, including 300 WSM, 7.5x55, 30/06, 30/30, 308 Win, and 300 Win Mag.
Product Overview
Figure 1: Lee Precision 90480 Undersize Mandrel .3035 in its packaging. This image displays the Lee Precision 90480 Undersize Mandrel .3035, packaged in a clear plastic bag. The label on the bag clearly indicates 'UNDERSIZED MANDREL .3035' along with the UPC barcode 734307904807. The mandrel itself is visible through the packaging, appearing as a small, slender metal rod with a black base.
The Lee Precision 90480 Undersize Mandrel is a precision-machined component designed to replace the standard mandrel in a Lee Collet Die. Its slightly smaller diameter (.3035 inches) allows for increased neck tension on the bullet, resulting in a firmer grip.
Setup
- Safety First: Always ensure your reloading area is clean, well-lit, and free from distractions. Wear appropriate safety glasses.
- Identify Your Collet Die: This undersize mandrel is specifically for Lee Collet Dies. Ensure you are using the correct die for your caliber.
- Remove Existing Mandrel: Carefully disassemble your Lee Collet Die according to its specific instructions to remove the standard mandrel. Refer to your Lee Collet Die manual for detailed disassembly procedures.
- Insert Undersize Mandrel: Insert the Lee Precision 90480 Undersize Mandrel .3035 into the collet die body, ensuring it seats correctly.
- Reassemble Die: Reassemble the collet die, ensuring all components are correctly aligned and tightened as per your collet die's instructions.
Note: This mandrel is a replacement part. Familiarity with the operation of the Lee Collet Die is assumed.
Operating Instructions
Once the Lee Precision 90480 Undersize Mandrel .3035 is installed in your Lee Collet Die, operate the die as you normally would. The primary difference will be the increased neck tension applied to the bullet.
- Prepare Cases: Ensure cases are clean, sized (if necessary, though the collet die primarily sizes the neck), and trimmed to the correct length.
- Lubricate Case Necks (Optional): Some reloaders prefer to lightly lubricate case necks before using a collet die, though it is often not required.
- Process Cases: Place a case into your press's shell holder and raise it into the collet die. The collet fingers will compress around the case neck as the ram is raised, and the undersize mandrel will expand the neck to the desired, tighter dimension.
- Inspect Results: After processing, inspect the case necks for proper tension. You may need to adjust the die setting slightly to achieve optimal results.
Compatible Calibers: This undersize mandrel is suitable for use with 300 WSM, 7.5x55, 30/06, 30/30, 308 Win, and 300 Win Mag calibers that utilize a Lee Collet Die.
Maintenance
- Cleaning: After use, wipe the mandrel clean with a soft cloth to remove any residue. A light coat of rust preventative oil can be applied for long-term storage.
- Storage: Store the mandrel in a dry environment to prevent corrosion. Keep it in its original packaging or a dedicated storage container to protect it from damage.
- Inspection: Periodically inspect the mandrel for any signs of wear, bending, or damage. A damaged mandrel can affect the quality of your reloaded ammunition.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Insufficient Neck Tension | Die not adjusted correctly; extremely hard case necks. | Ensure the collet die is properly adjusted. For very hard cases, annealing may be considered (consult advanced reloading guides). |
| Excessive Neck Tension / Damaged Necks | Die adjusted too aggressively; very soft case necks. | Adjust the collet die to a less aggressive setting. Ensure cases are not overly soft. |
| Mandrel Bending/Damage | Improper alignment; excessive force; foreign material in die. | Ensure proper alignment during operation. Disassemble and clean the die thoroughly. Replace damaged mandrel. |
Specifications
- Model Number: 90480
- Mandrel Diameter: .3035 inches
- Brand: Lee Precision
- Product Dimensions: Approximately 9.65 x 5.33 x 0.76 cm (3.8 x 2.1 x 0.3 inches)
- Item Weight: Approximately 4.54 g (0.01 lbs)
- Material: Metal (specific alloy not specified)
- UPC: 734307904807
- Compatible Calibers: 300 WSM, 7.5x55, 30/06, 30/30, 308 Win, 300 Win Mag (when used with appropriate Lee Collet Die)
Warranty and Support
Lee Precision products are known for their quality and durability. For specific warranty information, please refer to the documentation included with your original Lee Collet Die or visit the official Lee Precision website. For technical support or inquiries regarding the Lee Precision 90480 Undersize Mandrel .3035, please contact Lee Precision customer service directly.
Official Website: www.leeprecision.com
Note: Product specifications and warranty terms are subject to change by the manufacturer without prior notice.
