Accurate powder charging is paramount in reloading. A single misplaced grain can drastically alter the performance and safety of your ammunition. Lee Precision offers a range of powder measures, known for their affordability and reliability, but understanding how to use their charts effectively is crucial. This guide will delve into using a Lee powder measure chart, ensuring your reloading process is both precise and safe.
Understanding Your Lee Powder Measure
Before diving into the charts, it’s vital to identify the specific Lee powder measure you own. Lee produces several models, each with its own nuances and corresponding chart. Common models include the Lee Perfect Powder Measure, the Lee Auto-Disk Powder Measure, and the Lee Pro Auto-Disk Powder Measure. The chart you'll use depends entirely on which model you possess. Always consult the manual that came with your specific powder measure. This manual will contain the most accurate and up-to-date chart for your equipment.
Deciphering the Lee Powder Measure Chart
Lee powder measure charts typically organize data by:
- Powder Type: The chart will list various powder types, often categorized by their burn rate and manufacturer. Using the wrong chart for your powder is a critical error.
- Charge Weight: This is the weight of powder dispensed per charge, usually measured in grains. This is the primary information you'll obtain from the chart.
- Throwbar Setting: This setting on the powder measure determines the amount of powder dispensed. The chart will correlate specific throwbar settings with the desired charge weight for each powder type.
- Case Type: Some charts may further break down charge weights based on the type of cartridge case being loaded (e.g., .223 Remington vs. 30-06 Springfield). Pay close attention to this detail if your chart includes it.
Using the Chart: A Step-by-Step Guide
- Identify Your Powder: Double-check the powder container to confirm the exact powder type and manufacturer.
- Find the Correct Chart: Locate the appropriate chart for your specific Lee powder measure model.
- Locate Your Powder: Find your powder listed on the chart.
- Determine Desired Charge Weight: Refer to your reloading manual for the recommended charge weight for your chosen cartridge and projectile.
- Find Corresponding Throwbar Setting: Once you have your desired charge weight, locate the corresponding throwbar setting on the chart.
- Set the Throwbar: Adjust the throwbar on your powder measure to the setting you've identified.
- Test and Verify: Always perform a test run with several charges, weighing each one on a scale to ensure the measure is dispensing the correct amount of powder consistently.
Importance of a Powder Scale
No matter how accurate the chart, using a powder scale is absolutely essential. The chart provides a starting point, but variations in powder flow, static electricity, and other factors can slightly affect the dispensed charge weight. Always weigh each charge individually to ensure accuracy and safety. Consider this a critical safety precaution that should never be overlooked.
Safety First: Crucial Considerations
- Read the Manual: Always consult your Lee powder measure manual before using the chart. The manual provides vital safety information and instructions.
- Double-Check Everything: Double and triple-check your work at every step of the reloading process.
- Consistent Procedures: Maintain consistent procedures throughout your reloading sessions to minimize variations.
- Regular Maintenance: Keep your powder measure clean and properly lubricated for optimal performance.
By carefully following these steps and prioritizing safety, you can effectively utilize your Lee powder measure chart to achieve accurate and consistent reloading results. Remember, precise powder charging is not just about performance, but about the safety of yourself and others. Always prioritize safety over speed.
