Crimping .38 Special cartridges without a crimp groove requires a different approach than standard crimping. This guide will walk you through the process, emphasizing safety and precision for reliable, functional ammunition. Always prioritize safety when reloading ammunition. If you are unsure about any step, seek guidance from an experienced reloader.
Understanding the Challenge of Crimping Groove-less .38 Special
Factory .38 Special cartridges often feature a crimp groove to aid in consistent, reliable crimping. Without this groove, you need a technique that ensures proper bullet seating and prevents bullet setback during firing. Improper crimping can lead to dangerous malfunctions.
Essential Tools and Materials
Before you begin, gather the necessary tools and materials:
- Reloading Press: A single-stage or progressive press is suitable.
- .38 Special Dies: This includes a sizing die, a powder measure, a seating die, and a crimping die (possibly a separate factory crimp die or a roll crimp die). The choice of crimping die is critical for groove-less cartridges.
- Case Gauge: To ensure proper case sizing.
- Scale: For accurately measuring powder charges.
- Bullet Puller: For correcting mistakes.
- Caliper: For measuring cartridge overall length (OAL).
- .38 Special Bullets: Choose bullets designed for your reloading application.
- .38 Special Cases: Ensure they are properly cleaned and inspected.
- Gunpowder: Use the correct powder type and charge for your chosen bullet and case. Consult your reloading manual for specific data.
- Primers: Small pistol primers.
The Crimping Process: A Step-by-Step Guide
This guide assumes you have already completed the earlier steps of reloading (case preparation, powder charging, and bullet seating). Focus is solely on crimping without a crimp groove.
-
Selecting the Correct Crimping Die: For .38 Special cartridges lacking a crimp groove, a roll crimp die is generally preferred over a factory crimp die. A roll crimp uniformly compresses the case mouth around the bullet, providing a secure hold without relying on a pre-defined groove.
-
Adjusting the Crimping Die: This is the most crucial step. Improper adjustment can lead to insufficient or excessive crimping. Start by seating a bullet without crimping. Then slowly adjust the crimp die until a slight crimp is achieved. The goal is to firmly seat the bullet without deforming the case mouth excessively. Refer to your reloading manual for specific adjustments.
-
Crimping the Cartridge: Slowly run the cartridge through the crimping die. Observe the case mouth closely. You should see a uniform roll crimp, holding the bullet securely. Avoid over-crimping; this can damage the case or lead to feeding problems.
-
Inspection: After crimping, carefully inspect each cartridge. Ensure the crimp is consistent and the bullet is securely seated. Use a case gauge to verify the overall length is within acceptable parameters. Discard any cartridges with uneven crimps or improperly seated bullets.
-
Test Firing: Before loading a significant quantity of ammunition, it's crucial to test fire a small batch. Observe for any malfunctions or signs of improper crimping.
Safety Precautions: Always Remember These
- Consult your reloading manual: Always refer to the specific reloading data provided by the manufacturer of your components. Improper loads can be dangerous.
- Wear safety glasses: Protect your eyes from potential hazards.
- Work in a well-ventilated area: Gunpowder fumes can be harmful.
- Store ammunition properly: Keep reloaded ammunition away from sources of heat and moisture.
- Never mix components: Be sure you are using the correct primers, powder, bullets, and cases.
Troubleshooting Common Issues
- Bullet setback: If the bullet moves after crimping, adjust the seating die to firmly seat the bullet before crimping.
- Over-crimping: If the case mouth is severely deformed, adjust the crimping die to apply less pressure.
- Inconsistent crimps: Check for proper die adjustment and ensure the case mouth is uniformly compressed.
This guide provides a comprehensive approach to crimping .38 Special cartridges without a crimp groove. Remember, precision and safety are paramount in reloading. Always prioritize safe practices and consult your reloading manual for specific instructions and data related to your components. If you're new to reloading, seek guidance from experienced reloaders.
