Finding the right powder charge for your 9mm ammunition is crucial for both accuracy and safety. This guide focuses on using Bullseye powder, a popular choice for its versatility and suitability for a range of 9mm projectiles. We'll explore safe loading practices, provide data tables, and discuss the factors influencing your specific load development. Remember, always consult your reloading manual and prioritize safety above all else. This information is for educational purposes only; reloading ammunition involves inherent risks.
Understanding Bullseye Powder and its Properties
Bullseye powder is a relatively slow-burning, spherical powder. This makes it well-suited for handgun cartridges like the 9mm, producing consistent pressure and velocity. Its slow burn rate contributes to a lower peak pressure, which is beneficial for older or more delicate firearms. However, its slower burn rate means that it might not be ideal for high-velocity loads.
- Advantages: Consistent pressure curves, good accuracy potential, suitable for a wide range of bullet weights.
- Disadvantages: Not ideal for extremely high-velocity loads, can be more sensitive to variations in case volume.
Factors Affecting 9mm Bullseye Loads
Several factors influence the optimal Bullseye powder charge for your 9mm reloading. These include:
- Bullet Weight: Heavier bullets generally require more powder to achieve similar velocities. A heavier bullet requires more force and thus more powder.
- Case Brand and Capacity: Slight variations in case dimensions from different manufacturers can impact the pressure generated by a given powder charge. Case volume variation is crucial for consistent results.
- Primer Type: While generally less impactful than other factors, the primer can subtly influence ignition and pressure. Stiffer primers can increase pressure in the same manner as over-powder.
- Environmental Conditions: Temperature and humidity can affect powder burn rate. Lower temperatures can reduce velocity; in contrast, very high humidity could slow burn rate.
- Your Specific Firearm: Every firearm is unique, and what works perfectly in one gun might not be ideal in another.
Sample 9mm Bullseye Load Data
Disclaimer: The following load data is for informational purposes only. Always consult your reloading manual and verify the data with reputable sources before attempting to reload ammunition. This data is a starting point and may not be suitable for your specific firearm or components. Failure to follow safe reloading practices can result in serious injury or death.
| Bullet Weight (grains) | Bullet Type | Case Brand | Powder (grains) | Primer | COL (inches) | Notes |
|---|---|---|---|---|---|---|
| 115 | FMJ | Starline | 3.8 - 4.2 | CCI 500 | 1.125 | Start low and work up |
| 124 | FMJ | Starline | 4.0 - 4.4 | CCI 500 | 1.135 | Start low and work up |
| 147 | FMJ | Starline | 4.3 - 4.7 | CCI 500 | 1.145 | Start low and work up |
COL: Cartridge Overall Length
Important Note: This table shows a range of powder charges. You must start at the minimum charge and work up gradually, carefully observing for any signs of overpressure. Overpressure can lead to dangerous situations. Overpressure signs include:
- Excessive pressure signs: unusually loud report, flattened primers, excessive recoil, excessive gas escaping the barrel.
Always follow safe reloading practices: wear safety glasses, work in a well-ventilated area, and never exceed recommended maximum loads.
Step-by-Step Guide to Loading 9mm with Bullseye Powder
- Gather your supplies: This includes your reloading press, dies, cases, bullets, powder, primers, a scale (accurate to 0.1 grain), and a case gauge.
- Prepare your cases: Clean and inspect all cases for defects. Resize and deprime as needed.
- Charge your cases: Carefully measure the correct powder charge using a powder measure and scale. Double-check each charge to ensure consistency.
- Prime your cases: Install primers using a priming tool, ensuring each primer seats correctly.
- Seat your bullets: Carefully seat the bullets to the specified COL using the bullet seating die.
- Inspect your rounds: Examine each completed round for any defects or inconsistencies.
- Test your ammunition: Test fire a few rounds from your firearm to check for function. Pay close attention for signs of overpressure.
Conclusion: Responsible Reloading is Key
Reloading 9mm ammunition with Bullseye powder can be a rewarding experience, allowing for customized loads tailored to your preferences and firearm. However, it's crucial to remember that reloading is a serious endeavor requiring careful attention to detail and adherence to safety guidelines. Always prioritize safety, consult your reloading manual, and start at the minimum charge, increasing gradually while monitoring for overpressure indicators. Enjoy the process, and shoot safely!