The .308 Winchester, a popular cartridge for hunting and target shooting, requires precision reloading components for optimal performance. One crucial element is the small base die. This guide delves into the specifics of small base dies for .308 Winchester, explaining their function, benefits, and considerations for successful reloading.
Understanding Small Base Dies
A small base die is a specialized reloading die designed to resize fired .308 Winchester cases to a slightly smaller diameter than standard dies. This reduction in case diameter, particularly at the base, addresses a common issue: case head separation.
Case Head Separation: The Problem & the Solution
Repeated firings can cause brass to stretch, particularly around the case head. This stretching weakens the brass, increasing the risk of case head separation during subsequent firings—a potentially dangerous situation. Standard full-length resizing dies can exacerbate this problem by further stretching the already weakened brass.
Small base dies combat this by:
- Reducing case body expansion: By resizing the case to a smaller diameter, they lessen the amount of expansion that occurs during firing.
- Minimizing brass stretching: This reduction in expansion translates to reduced stretching of the brass, prolonging its lifespan and reducing the risk of case head separation.
- Improving feeding reliability: A more consistent case diameter improves feeding reliability in semi-automatic rifles.
Benefits of Using a Small Base Die for .308 Winchester
The benefits extend beyond preventing case head separation. Using a small base die for .308 reloading offers:
- Increased Accuracy: Consistent case dimensions contribute to improved accuracy by ensuring proper chambering and consistent bullet seating depth.
- Extended Brass Life: By reducing brass stretching, the lifespan of your .308 Winchester brass is extended, saving you money in the long run.
- Reduced Reloading Time: While requiring a slightly more delicate touch, the reduced stretching allows for fewer resizing passes, saving time during the reloading process.
- Improved Semi-Automatic Function: The enhanced case sizing promotes smoother operation in semi-automatic rifles.
Choosing and Using a Small Base Die
Selecting the right small base die for your .308 Winchester reloading needs requires careful consideration. Factors include:
- Die Brand: Reputable brands like RCBS, Hornady, Lee, and Redding offer high-quality small base dies. Research and choose a brand known for its precision and reliability.
- Compatibility: Ensure the die is compatible with your specific reloading press.
- Adjustments: Small base dies require precise adjustments. Start with minimal sizing, gradually increasing until you achieve proper case sizing without damaging the brass. Over-sizing can lead to problems.
Using a small base die involves:
- Proper lubrication: Lubricating the cases thoroughly before resizing is crucial to prevent damage.
- Careful adjustments: Start with minimal resizing and gradually increase as needed.
- Regular inspection: Inspect your resized cases for any signs of damage.
Conclusion: Small Base Dies - A Valuable Investment
While requiring a bit more attention to detail, the benefits of using a small base die for .308 Winchester reloading are undeniable. By reducing the risk of case head separation, increasing brass life, and enhancing accuracy, a small base die represents a worthwhile investment for serious reloaders. Remember to always prioritize safety and follow recommended reloading procedures. Happy reloading!
