Quick Answer
When choosing a powder for handloads, consider the specific rifle caliber, bullet weight, and desired performance characteristics, such as accuracy and expansion. Look for a powder with a burn rate that matches the rifle's chamber pressure and barrel length. Consult reloading manuals and seek advice from experienced handloaders.
Choosing the Right Burn Rate
Selecting the correct burn rate is crucial for achieving optimal performance and preventing excessive pressure. Burn rates are typically classified into three categories: fast, medium, and slow. Fast burn rates are suitable for light bullets (100-120 grains) in short barrels (16-18 inches), while medium burn rates are ideal for medium-weight bullets (140-180 grains) in medium-length barrels (20-24 inches). Slow burn rates are best suited for heavy bullets (200-300 grains) in long barrels (26-30 inches).
Considerations for Rifle Caliber and Bullet Weight
Different rifle calibers and bullet weights require specific powders to achieve optimal performance. For example, a .243 Winchester with a 80-grain bullet typically requires a fast-burning powder, such as Alliant Reloder 15 or Hodgdon Varget. In contrast, a .300 Winchester Magnum with a 180-grain bullet requires a medium-burning powder, such as Hodgdon Retumbo or IMR 4831.
Loading Benchmarks and Pressure Considerations
When selecting a powder, refer to the manufacturer’s recommended starting load and maximum load to ensure safe and reliable operation. A good rule of thumb is to start with a load that is 10-20% below the maximum load and gradually increase the load in 0.1-grain increments. Always check the pressure gauge to ensure the load is within safe limits.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.