The .308 Winchester remains a popular and versatile cartridge, used for everything from hunting to target shooting. Reloading your own ammunition allows for greater control over accuracy and cost-effectiveness. This guide provides comprehensive information on H380 load data for the .308 Win, emphasizing safety and precision. Remember, always double-check your load data with multiple sources before loading and firing.
Understanding H380 Powder
H380 is a relatively slow-burning, extruded powder often chosen for its accuracy and suitability in various cartridge types, including the .308 Winchester. Its characteristics make it a good choice for heavier bullets and longer barrels. However, it's crucial to understand its sensitivity and follow loading guidelines meticulously. Improper loading can lead to dangerous pressure increases.
Key Characteristics of H380:
- Burn Rate: Relatively slow
- Suitable for: Heavier bullets (150 grains and above)
- Accuracy Potential: Generally considered very accurate
- Temperature Sensitivity: Moderate; performance can be affected by extreme temperatures.
- Metering: Meters fairly well, but consistent powder measure technique is still essential.
Safety First: Reloading Precautions
Before delving into specific load data, let's reiterate the paramount importance of safety:
- Always consult multiple reliable sources for load data: Never rely on a single source. Cross-reference your findings to ensure accuracy and safety.
- Start low and work up: Begin with the minimum charge weight listed in your chosen data source. Gradually increase the charge weight in small increments, carefully observing pressure signs.
- Use a reloading scale: Accurate powder measurement is critical. A digital scale capable of measuring to 0.1 grain is recommended.
- Inspect your cases: Look for cracks, dents, or other damage before reloading.
- Wear appropriate safety gear: Eye protection and hearing protection are mandatory.
- Load in a well-ventilated area: Powder fumes can be irritating and potentially harmful.
- Never force a cartridge into the chamber: If you encounter resistance, stop immediately. There's likely a problem with the cartridge or the firearm.
H380 Load Data for .308 Winchester (Sample Data - Always Verify with Multiple Sources)
The following table presents sample load data for H380 powder in .308 Winchester. This data is for illustrative purposes only and should not be used without verification from at least two other reliable reloading manuals. Always start with the minimum charge and work up cautiously.
| Bullet Weight (grains) | Bullet Type | OAL (inches) | Powder Charge (grains) | Primer | COL (inches) | Notes |
|---|---|---|---|---|---|---|
| 150 | FMJ | 2.810 | 42.0 | CCI 200 | 2.010 | Start Here |
| 150 | FMJ | 2.810 | 43.0 | CCI 200 | 2.010 | Work Up Gradually |
| 168 | BTHP | 2.810 | 40.5 | CCI 200 | 2.010 | Start Here |
| 168 | BTHP | 2.810 | 41.5 | CCI 200 | 2.010 | Work Up Gradually |
| 180 | HPBT | 2.810 | 39.0 | CCI 200 | 2.010 | Start Here |
| 180 | HPBT | 2.810 | 40.0 | CCI 200 | 2.010 | Work Up Gradually |
Note: OAL (Overall Length) and COL (Case Overall Length) are crucial for proper chambering and safe operation. Consult your reloading manual and firearm's specifications for recommended values. Always measure your loaded rounds to ensure consistency. The primer type listed is a suggestion; check your manual for compatibility.
Monitoring Pressure Signs
During your load development process, meticulously inspect fired cases for pressure signs. These are visual indicators that your loads are approaching dangerously high pressure levels. Stop immediately if you observe any of the following:
- Flattened primers: Primers exhibiting a significant flattening or bulging.
- Excessive case head expansion: Significant increase in case diameter near the head.
- Unusual sounds or recoil: Notably louder than usual or unusually sharp recoil.
- Stuck cases: Difficulty in extracting fired cases.
Case Studies and Real-World Examples
While providing specific load data from individual experiences isn’t advisable due to safety concerns, it’s important to note that various online forums and reloading communities discuss H380 load data for .308 Winchester. However, always treat these discussions as informational and not as a substitute for verified data from reputable sources.
Conclusion: Responsible Reloading with H380
H380 can be a highly accurate powder for .308 Winchester loads, but safe and responsible reloading practices are non-negotiable. Thoroughly understand the powder’s characteristics, meticulously follow established load data from trusted sources, and closely monitor for pressure signs. Remember, safety should always be your top priority. By diligently following these guidelines, you can enjoy the benefits of reloading your own ammunition with H380 for the .308 Winchester.