Lee Precision is a well-known name in the reloading world, and their bullet molds are a popular choice for many reloaders. Understanding how to use a Lee bullet mold chart effectively is crucial for producing consistent, accurate bullets. This comprehensive guide will walk you through everything you need to know about Lee bullet molds and their accompanying charts, helping you get the most out of your reloading experience.
Understanding Lee Bullet Mold Charts
Lee bullet mold charts provide crucial information needed to correctly cast bullets using their molds. These charts aren't just simple tables; they are essential tools for achieving consistent results. They typically include information on:
- Bullet Weight: This is the expected weight of the bullet cast using the specific mold and alloy at a particular size.
- Alloy Recommendations: The chart specifies the best alloy to use for optimal results. Different alloys (lead, lead alloys with tin or other metals) affect hardness, expansion, and accuracy. Using the wrong alloy can lead to poor bullet performance and even damage to your mold.
- Casting Temperature: The ideal temperature range for melting and pouring your alloy is critical. Too low, and you'll get poor fill; too high, and you risk damaging your mold or creating inconsistent bullets.
- Lubrication Recommendations: Proper bullet lubrication is crucial for smooth feeding in your firearm. The chart might recommend specific sizes of lube, the type of lube to use, or sizing dimensions.
- Bullet Dimensions: The chart specifies the expected dimensions of the cast bullet, including diameter, length, and overall shape.
Decoding the Chart's Information
Lee bullet mold charts often use abbreviations and specialized terminology. It’s essential to understand these to interpret the chart correctly. For instance, you might see notations referring to:
- Hardness: Measured in Brinell Hardness Numbers (BHN), this indicates the resistance of the bullet to deformation. This is crucial for proper function in different firearms.
- Alloy Composition: The exact percentage of lead, tin, and other metals in the alloy will significantly impact your final bullet's properties.
Using the Lee Bullet Mold Chart: A Step-by-Step Guide
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Identify Your Mold: First, identify the exact mold number you're using. Lee Precision typically uses a numbering system to identify each mold.
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Check the Alloy: The chart specifies the recommended alloy for your mold. Use a calibrated scale to measure the correct alloy proportions for consistent results.
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Set Your Casting Temperature: The chart will provide the optimal casting temperature. Use a reliable thermometer to monitor the temperature accurately.
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Pouring the Molten Metal: Follow the instructions for your specific pot and mold. Consistent pouring technique is key to creating well-formed bullets.
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Cooling and Ejection: Once the bullet cools and solidifies, carefully eject it from the mold. Pay attention to the mold's design and its instructions for safe ejection.
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Sizing and Lubrication: After casting, you may need to size and lubricate the bullets according to the specifications provided in the chart. Improper sizing or lubrication can affect feeding and accuracy.
Case Study: Analyzing a Specific Lee Bullet Mold Chart
Let's take a hypothetical example. Imagine you're using Lee's 9mm 124-grain round nose mold (#90302). The chart might indicate:
| Parameter | Value |
|---|---|
| Bullet Weight | 124 grains (with specific alloy) |
| Alloy Recommendation | 90/10 lead/tin |
| Casting Temperature | 700-720°F |
| Lubrication | Size to .356", then lube with Lee Liquid Alox |
This table shows the importance of following these instructions precisely. Using a different alloy or temperature could result in inaccurate bullet weights or even damage to your mold.
Troubleshooting Common Issues
Even with a Lee bullet mold chart, issues might arise. Some common problems include:
- Poor Fill: This could be caused by too low a casting temperature, too fast a pour, or air bubbles in the molten lead.
- Air Bubbles in the Bullets: This often results from inadequate venting in the mold or insufficient time for the metal to settle.
- Misaligned Bullets: This often points to a problem with mold alignment or inconsistent pouring.
Refer to the chart, but if problems persist, consult the Lee Precision website or contact their customer service.
Conclusion
Lee bullet mold charts are more than just simple tables; they are precise guides for accurate and safe reloading. By carefully following the instructions and understanding the provided data, reloaders can produce consistent, high-quality bullets for their firearms. Remember to always prioritize safety when reloading and follow all recommended procedures. Consistent, accurate reloading depends on understanding and using the Lee bullet mold chart properly.