For reloaders, achieving consistent powder charges is paramount for safety and accuracy. Lee Precision, a respected name in reloading equipment, offers a variety of powder measures, each requiring a slightly different approach to achieving optimal performance. This guide provides a comprehensive overview of Lee powder measure charts, explaining how to use them effectively and troubleshoot common issues. We'll also cover important safety considerations and tips for achieving the best results with your Lee powder measure.
Understanding Lee Powder Measure Types
Lee offers several powder measure designs, each catering to different needs and levels of precision:
1. Lee Auto-Disk Powder Measure
This is a popular choice for its affordability and relatively high throughput. The Auto-Disk utilizes a rotating disk with adjustable metering holes to dispense powder. The chart for this measure usually includes a table correlating the disk setting with the approximate powder charge weight for various calibers and powder types.
2. Lee Pro Auto-Disk Powder Measure
An upgrade to the standard Auto-Disk, the Pro version boasts improved accuracy and features like a case-activated powder drop mechanism. Its chart will likely offer finer graduations and potentially more specific data for a wider range of powders.
3. Lee Perfect Powder Measure
This is Lee's top-of-the-line powder measure, designed for maximum precision and consistency. It uses a different metering mechanism than the Auto-Disk models, often employing a more precise weight-based system. The chart accompanying the Perfect Powder Measure usually includes detailed instructions and calibration procedures beyond the simple charge weight correlations found in the Auto-Disk charts.
How to Use a Lee Powder Measure Chart
While the specific format varies slightly depending on the powder measure model and the powder type, most Lee powder measure charts follow a similar structure:
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Identify Your Powder Measure Model: This is crucial, as different models use different metering systems and therefore have different charts.
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Locate Your Powder Type: The chart will typically list various powder types. Ensure you select the correct powder type; using the wrong data can lead to dangerous overcharges or undercharges.
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Find Your Caliber: The chart will list common calibers. Select the appropriate caliber for your reloading project.
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Determine Desired Charge Weight: Consult your reloading manual or published data for the recommended charge weight for your specific ammunition.
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Locate the Corresponding Measure Setting: Using the chart, find the measure setting (usually a number or letter) that corresponds to your desired charge weight, powder type, and caliber.
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Calibrate Your Powder Measure: Even with the chart, it's vital to calibrate your powder measure. This involves dispensing multiple charges and weighing them to ensure consistent results. Adjust the measure setting as needed to achieve the desired weight.
Troubleshooting Common Issues
- Inconsistent Powder Charges: This is often due to improper calibration, static electricity, or clumps in the powder. Ensure your powder is flowing freely and your measure is properly adjusted.
- Powder Bridges: These can hinder accurate metering. Use a powder funnel and gently tap the measure to avoid bridging.
- Incorrect Chart Use: Double-check you're using the correct chart for your powder measure model and powder type.
Safety First: Always Double-Check Your Charges
Never rely solely on the powder measure chart. Always weigh each charge individually, especially when using a new powder or measure. This is the single most important step to ensure safety and accuracy in reloading. Using a scale is crucial for consistent and safe reloading.
Conclusion
Lee powder measure charts are valuable tools, but they are only as good as the user's understanding and attention to detail. By following the instructions carefully and taking the necessary precautions, you can use these charts to achieve accurate and safe powder charges for your reloading projects. Remember, consistent practice and diligent calibration are key to successful and safe reloading.
