Choosing the right bushing for your MEC reloading press when using Alliant powders is crucial for consistent and safe reloading. This guide provides a comprehensive look at MEC bushings and how to select the appropriate one for various Alliant powder types and shotgun shell loads. While specific bushing numbers will vary depending on your shell gauge (12, 20, 28, etc.), the principles remain the same. This information is for guidance only; always refer to your powder manufacturer's data and your reloading manual for precise load data.
Understanding MEC Bushings and Their Function
MEC reloading presses utilize bushings to meter powder charges. These bushings are precisely sized to dispense a specific volume of powder with each press cycle. The size of the bushing directly correlates to the amount of powder dispensed. Smaller bushing numbers generally correspond to smaller powder charges. Because different powders have varying densities, the same bushing number will deliver different powder weights for different powders.
Why Using the Right Bushing is Critical
Using the incorrect bushing can lead to several serious problems:
- Inconsistent Loads: Variations in powder charge can lead to inconsistent shot patterns, reduced accuracy, and potentially dangerous over- or under-pressure situations.
- Squib Loads: An undercharged shell can result in a squib load, a dangerous condition where the powder charge is insufficient to propel the shot, potentially damaging your firearm.
- Over-Pressure: Overcharging a shell can lead to excessive pressure, which can cause damage to your firearm or even serious injury.
Finding Your MEC Bushing for Alliant Powders: A Step-by-Step Approach
Unfortunately, a single, universal MEC bushing chart for all Alliant powders doesn't exist. The ideal bushing size is highly dependent on several factors:
- Powder Type: Different Alliant powders (e.g., Unique, Red Dot, Steel, etc.) have different densities, requiring different bushing sizes to achieve the same powder weight.
- Shot Shell Gauge: The gauge of your shotgun shell (12, 20, 28 gauge) will affect the amount of powder required, thus influencing bushing selection.
- Desired Powder Charge: The amount of powder you want to use in each shell is determined by your reloading manual and the specific load you are creating.
Here's how to find the right bushing:
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Consult Your Alliant Powder Manual: This is your primary source for load data. It will specify the appropriate powder charge for your chosen shot shell and desired load.
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Refer to Your MEC Reloading Press Manual: This manual usually provides general guidance on bushing selection and may include a chart relating bushing numbers to approximate powder weight for your specific press model. Note that this is an approximation and needs to be fine-tuned.
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Start with an Estimated Bushing: Using the information from steps 1 and 2, select a bushing that you anticipate will deliver a charge close to your target.
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Test and Adjust: Reload a small batch of shells (3-5) using your chosen bushing. Carefully weigh the powder charge in each shell. Compare the actual weight to your desired powder charge. Adjust your bushing accordingly, using a smaller bushing number for less powder and a larger number for more.
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Record Your Findings: Keep meticulous records of your bushing number, powder type, powder weight, and the corresponding load data. This will save you time and effort in the future.
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Always Double-Check: Before loading your shells, double-check all components, including the powder charge, to ensure accuracy and safety.
Important Safety Considerations
- Never exceed the maximum powder charge listed in your reloading manual.
- Always wear safety glasses and hearing protection when reloading.
- Handle powder in a well-ventilated area, away from open flames.
- Use a powder scale to accurately weigh your powder charges.
By following these steps and prioritizing safety, you can confidently select the correct MEC bushing for your Alliant powders and enjoy consistent, safe, and accurate reloading. Remember that consistent practice and meticulous record-keeping are essential for successful reloading. If you have any doubts or uncertainties, consult with experienced reloaders or seek professional guidance.
