Understanding and correctly utilizing H380 load data for the .308 Winchester is crucial for safe and accurate reloading. This guide provides in-depth information on this powder, offering a blend of safety advice, practical tips, and detailed load data. Always remember: safety is paramount when reloading ammunition. This information is for educational purposes only; always consult your reloading manual and follow its instructions carefully.
Understanding H380 Powder
H380 is a relatively slow-burning extruded powder often favored for its versatility in various calibers, including the .308 Winchester. It's known for producing moderate pressures and consistent velocity, making it a good choice for both target shooting and hunting loads. Its burn rate is slower than some other .308 powders, which translates to potentially lower recoil and less felt recoil.
However, like all powders, H380 has specific characteristics that demand attention:
- Temperature Sensitivity: H380's performance can be affected by temperature variations. This means that load consistency might vary slightly depending on the ambient temperature during reloading or shooting.
- Compatability: While versatile, always confirm H380's compatibility with your specific bullet weight and case before loading. Using incompatible components can lead to dangerous pressure increases.
- Proper Measurement: Precise powder measurement is crucial. Use a reliable scale and measure each charge individually, avoiding any shortcuts that could lead to inconsistent loads and potential over-pressure.
H308 Load Data Considerations
Before diving into specific load data, it's important to emphasize some key considerations:
- Your Reloading Manual: This is your primary source of information. Always refer to it first and follow its instructions carefully. This guide complements, but does not replace, your manual.
- Bullet Selection: Bullet weight and type significantly impact the optimal powder charge. Heavier bullets generally require more powder. Bullet design (e.g., boat-tail vs. flat-base) also affects pressure and accuracy.
- Case Preparation: Consistent case preparation is essential for reliable results. This includes resizing, trimming, cleaning, and priming. Inconsistent cases will lead to inconsistent loads.
- Equipment: Proper equipment is essential. This includes a reliable reloading press, powder measure, and case trimmer.
Sample H380 Load Data for .308 Winchester
Disclaimer: The following load data is for informational purposes only. It is crucial to consult your reloading manual for accurate and safe load data specific to your equipment, bullets, and primers. Never exceed the maximum load listed in your manual.
The table below shows example load data and is NOT a substitute for your reloading manual's data. Always double-check your data source and prioritize safety.
| Bullet Weight (grains) | Bullet Type | Primer Type | Powder Charge (grains) | COL (inches) | Notes |
|---|---|---|---|---|---|
| 150 | FMJ | Federal 210 | 42.0 - 44.0 | 2.800 | Start low and work up slowly. |
| 168 | BTHP | CCI 200 | 40.0 - 42.0 | 2.810 | Start low and work up slowly. |
| 175 | FMJBT | Winchester WLR | 39.0 - 41.0 | 2.820 | Start low and work up slowly. |
Note: COL refers to Cartridge Overall Length. Always measure your COL carefully and ensure it's within the safe range specified in your reloading manual. The variations in the powder charge represent a loading range; start at the lower end and work up gradually, carefully monitoring pressure signs.
Safety Precautions
- Never exceed maximum loads: Always stay within the recommended pressure range. Overloading can result in catastrophic equipment failure and injury.
- Wear safety glasses and hearing protection: Always protect your eyes and ears when reloading and shooting.
- Proper ventilation: Work in a well-ventilated area.
- Clean your equipment regularly: Cleanliness is essential for accurate and safe reloading.
- Double-check your work: Before firing, double-check each round to ensure it is properly loaded and the cartridge overall length is within specification.
Conclusion
Reloading with H380 powder for .308 Winchester can be a rewarding experience, providing consistent and accurate ammunition. However, it requires meticulous attention to detail, careful adherence to safety guidelines, and a thorough understanding of the process. Always consult your reloading manual and prioritize safety above all else. Remember this information is only a starting point—responsible reloading practices are key to safe and enjoyable shooting.