The 300 Blackout cartridge has quickly gained popularity among shooters for its versatility and effectiveness in various applications, from home defense to hunting. Reloading your own ammunition offers significant advantages in terms of cost savings and the ability to tailor loads to your specific firearm and needs. This guide focuses on Sierra bullets and provides comprehensive 300 Blackout load data to help you get started safely and effectively. Remember, always prioritize safety and consult your firearm's manual before attempting any reloading.
Understanding Sierra 300 Blackout Bullets
Sierra Bullets are renowned for their high-quality construction and accuracy. They offer several excellent choices for the 300 Blackout cartridge, each designed for specific purposes:
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110gr Sierra GameKing HPBT: This bullet is an excellent all-around choice for both hunting and target shooting. Its hollow point boat tail (HPBT) design provides good accuracy and controlled expansion. This is an excellent choice for subsonic loads as well.
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125gr Sierra MatchKing: Designed for extreme accuracy, the MatchKing is a favorite among competitive shooters and those seeking pinpoint precision. Its full metal jacket (FMJ) construction is ideal for target practice.
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220gr Sierra MatchKing: For subsonic applications, heavier bullets offer improved stability and accuracy. The 220gr MatchKing is a top choice for suppressed shooting.
Choosing the Right Bullet: The selection of your bullet will significantly impact your load data. Pay close attention to the bullet's weight, construction, and intended use when selecting load data.
Key Factors Affecting 300 Blackout Load Data
Several factors influence your 300 Blackout load development:
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Powder: Different powders burn at different rates, leading to variations in pressure and velocity. Popular powders for 300 Blackout include CFE BLK, Accurate Arms #9, and Lil'Gun. Always use a powder specifically recommended for the 300 Blackout cartridge.
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Primer: Primer type can also slightly affect pressure and ignition. Small rifle primers are generally recommended.
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Case: Brass case brands can have slight dimensional differences which can impact pressure. Use consistent case brands for optimum results.
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Barrel Length: Your barrel length will directly influence velocity. Shorter barrels will result in lower velocities compared to longer barrels.
Sample Sierra 300 Blackout Load Data
Disclaimer: The following load data is for informational purposes only. Always refer to the latest reloading manuals from Sierra Bullets and your powder manufacturer before attempting any reloading. This data is for general guidance and must be adjusted based on your specific equipment and components. Never exceed maximum recommended loads.
| Bullet | Powder | Powder Charge (Grains) | Primer | Velocity (fps) (approx) | Notes |
|---|---|---|---|---|---|
| 110gr Sierra GameKing HPBT | CFE BLK | 19.0 - 20.5 | Small Rifle | 2200 - 2350 | Supersonic load |
| 110gr Sierra GameKing HPBT | Accurate #9 | 20.0 - 21.5 | Small Rifle | 2100 - 2250 | Supersonic load |
| 125gr Sierra MatchKing | CFE BLK | 18.0 - 19.5 | Small Rifle | 2000 - 2150 | Supersonic load |
| 220gr Sierra MatchKing | Accurate #9 | 14.0 - 15.0 | Small Rifle | 950 - 1050 | Subsonic load, Suppressor Recommended |
Note: These are approximate velocities. Actual velocities will vary depending on your specific equipment and environmental conditions.
Safety Precautions for Reloading 300 Blackout
- Always wear safety glasses: Protect your eyes from flying debris.
- Work in a well-ventilated area: Powder fumes can be harmful.
- Never exceed maximum recommended loads: Overloading can lead to catastrophic equipment failure.
- Use a reloading scale to accurately measure powder charges: Consistent powder charges are crucial for safe and accurate ammunition.
- Carefully inspect your cases and bullets before loading: Any defects could lead to dangerous malfunctions.
- Start with minimum loads and gradually work up: This helps you identify potential problems and optimize your loads.
- Always consult your firearm's manual: Ensure your loads are compatible with your specific firearm.
- Regularly clean your reloading equipment: Maintain your equipment for optimal performance and safety.
Conclusion: Responsible Reloading with Sierra 300 Blackout Bullets
Reloading your own 300 Blackout ammunition offers numerous benefits. By carefully following reloading manuals, safety precautions, and using high-quality components like Sierra Bullets, you can create accurate and reliable ammunition tailored to your specific needs. Remember, reloading is a skill that requires patience, precision, and a commitment to safety. Always prioritize safety and consult reliable resources before starting your reloading journey.