Reloading your own 40 Smith & Wesson ammunition can be a rewarding experience, offering cost savings and the ability to tailor loads to your specific firearm. However, it's crucial to approach reloading with meticulous care and attention to safety. This comprehensive guide provides essential information on 40 S&W reload data, emphasizing safety and accuracy. Disclaimer: Always consult your firearm's owner's manual and load data from reputable sources before attempting to reload ammunition. The information provided here is for informational purposes only and should not be considered a substitute for professional guidance.
Understanding 40 S&W Cartridge Specifications
Before diving into reload data, it's vital to understand the 40 S&W cartridge's specifications. This includes:
- Case Length: Approximately 1.100 inches. Variations can exist depending on manufacturer.
- Primer Type: Small pistol primer.
- Bullet Weight: Ranges widely from 135 grains to 200 grains, influencing powder choice and load data significantly. Popular weights include 155, 165, and 180 grains.
- Powder Capacity: This varies depending on the specific case and bullet combination, so precise measurement is paramount.
Essential Reloading Equipment for 40 S&W
Safe and successful reloading necessitates the correct equipment. Ensure you have:
- Reloading Press: A single-stage, progressive, or turret press, depending on your volume needs and preference.
- Dies: A three-die set (sizing, powder, and bullet seating) specifically designed for 40 S&W.
- Powder Measure: A precise powder measure is crucial for consistent and safe loads.
- Scale: An electronic powder scale ensures accurate powder charges, minimizing the risk of overloads or underloads.
- Case Gauge: Checks case length after resizing.
- Bullet Puller: For removing bullets from loaded cartridges, if necessary.
- Safety Glasses and Hearing Protection: Absolutely mandatory for all reloading activities.
- Case Trimmer: To ensure consistent case length for optimal performance and reliable feeding.
Sourcing Reliable 40 S&W Reload Data
Using reliable load data is paramount for safety and accuracy. Never deviate from established data without extensive experience and understanding. Consult these sources:
- Powder Manufacturer's Load Data: The most trustworthy source, providing specific data for their powders and various bullet weights. Look for data sheets on the manufacturer's website.
- Reputable Reloading Manuals: Books from well-known publishers, such as Lyman, Hornady, Sierra, and Lee Precision, offer comprehensive data and guidance.
- Online Forums (Use Caution): While online forums can be helpful, always verify information with official sources before implementing any load data found there.
Steps in Reloading 40 S&W Ammunition
Reloading involves several steps:
- Case Preparation: Clean, inspect, and resize cases using your resizing die. Trim cases to the correct length if necessary.
- Primer Seating: Use a priming tool to carefully seat primers in each prepared case.
- Powder Charging: Accurately measure and charge each case with the appropriate powder amount based on your chosen load data. Double-check each charge using your powder scale.
- Bullet Seating: Seat the bullets to the correct depth as specified in your load data using your bullet seating die.
- Crimping (Optional): Some load data may recommend crimping the bullet to secure it in place. Use a crimping die if necessary.
- Inspection: Carefully inspect each round for any flaws, ensuring proper bullet seating, consistent powder charges, and clean cases.
Understanding the Importance of Starting Low and Working Up
When working with new load data, always start with the minimum charge weight recommended by the manufacturer. Gradually increase the charge weight in small increments, meticulously documenting your results and noting any changes in pressure signs or accuracy. Never exceed the maximum recommended charge weight.
Troubleshooting Common Reloading Problems
- Difficult Case Sizing: Check your sizing die adjustments and ensure lubrication is properly applied.
- Inconsistent Powder Charges: Verify your powder measure is properly calibrated and clean. Also, ensure you are using an accurate scale.
- Bullet Seating Issues: Check your bullet seating die adjustments and ensure the bullets are properly lubricated.
By carefully following these guidelines, utilizing reputable sources, and prioritizing safety, you can confidently and safely reload 40 S&W ammunition. Remember that consistent practice and meticulous attention to detail are key to successful and safe reloading. Always consult your firearm's manual and prioritize safety above all else.
