Finding the right powder for your .308 Winchester reloading is crucial for accuracy and safety. BL-C(2) is a popular choice, known for its versatility and performance, but understanding its nuances is essential for optimal results. This guide provides comprehensive reloading data for .308 Winchester using BL-C(2) powder, emphasizing safety and accuracy. Always consult your own reloading manuals and prioritize safety above all else. The information below serves as a starting point and should not replace established reloading guidelines.
Understanding BL-C(2) Powder
BL-C(2) is a relatively slow-burning, extruded powder, making it well-suited for larger rifle cartridges like the .308 Winchester. Its burn rate characteristics contribute to consistent velocity and reduced pressure spikes, leading to improved accuracy. However, its sensitivity to changes in temperature and variations in charge weight necessitates careful attention to detail during the reloading process.
Factors Affecting Reloading Data
Several factors influence the optimal reloading data for your specific setup. These include:
- Bullet Weight: Heavier bullets generally require a higher powder charge to achieve desired velocities.
- Bullet Type: The bullet's ballistic coefficient (BC) and design affect its performance and the required powder charge.
- Case Capacity: Variations in case capacity between manufacturers can influence pressure and velocity.
- Rifle Characteristics: The specific dimensions of your rifle's chamber can impact the pressure generated.
- Environmental Conditions: Temperature and humidity affect powder burn rate.
Sample Reloading Data for .308 Winchester with BL-C(2) (Disclaimer: This is sample data only. Always refer to your reloading manual.)
This table provides example load data. It is not a substitute for your own reloading manual and should not be used without cross-referencing reputable sources. Always start at the minimum charge weight and work up gradually, carefully monitoring pressure signs.
| Bullet Weight (grains) | Bullet Type | OAL (inches) | Starting Charge (grains) | Maximum Charge (grains) | Notes |
|---|---|---|---|---|---|
| 150 | FMJ | 2.800 | 42.0 | 44.0 | Observe for pressure signs. |
| 168 | Match BT | 2.810 | 41.0 | 43.0 | Pay close attention to pressure. |
| 175 | Match HPBT | 2.820 | 40.0 | 42.0 | Recommended for experienced reloaders. |
OAL (Overall Length): Measure carefully to ensure proper chambering in your rifle. Too long of an OAL can lead to dangerous pressure spikes.
Important Considerations:
- Pressure Signs: Carefully inspect your cases for signs of excessive pressure, such as flattened primers, overly sticky extraction, or excessive case head expansion. If you observe any of these signs, immediately cease loading and reduce the powder charge.
- Chronograph: Using a chronograph to measure velocity is highly recommended to ensure consistent performance and identify potential problems.
- Safety Equipment: Always wear appropriate safety glasses and hearing protection when reloading.
- Cleanliness: Maintain a clean reloading space to avoid contamination and misfires.
- Proper Tools: Invest in quality reloading tools and follow manufacturer's instructions.
Beyond the Data: Achieving Optimal Performance
Optimal .308 Winchester loads with BL-C(2) are not simply a matter of choosing a charge weight from a table. It involves a process of careful experimentation, precise measurement, and attention to detail. Consider these additional factors:
- Lot-to-Lot Variation: Powder manufacturers' production processes can lead to slight variations between powder lots. Always test new lots before loading a large batch of ammunition.
- Temperature Sensitivity: BL-C(2), like most powders, is sensitive to temperature fluctuations. Adjust your charges accordingly depending on the ambient temperature.
- Primer Selection: Choose a primer appropriate for your powder and bullet combination.
This guide provides a foundation for loading .308 Winchester ammunition with BL-C(2) powder. Remember that safety and accuracy are paramount. Always refer to your specific reloading manuals and consult with experienced reloaders for guidance. Safe and responsible reloading practices are essential for a pleasant and productive reloading experience.
