R&R | 357 Sig, a Reloader’s Cartridge, and Common Issues With It

Published on August 15, 2024
Duration: 15:57

This video provides an in-depth look at reloading the .357 SIG cartridge, highlighting its performance potential and common reloading challenges. The instructor, an experienced reloader, details issues such as de-priming stem problems with Lee dies, the critical importance of neck tension to prevent bullet setback, and the necessity of using appropriate bullet profiles. He emphasizes the effectiveness of Longshot powder and recommends specific bullet types like Hornady XTP and Federal V-Crown for optimal results.

Quick Summary

Reloading .357 SIG presents challenges like die stem issues and critical neck tension to prevent bullet setback. Using appropriate bullet profiles with a long shank, such as Hornady XTP or Federal V-Crown, and powders like Longshot is essential for optimal performance and safety.

Chapters

  1. 00:01Introduction to .357 SIG Reloading
  2. 00:17Performance of .357 SIG vs. .357 Magnum
  3. 01:13Underwood Ammunition Discussion
  4. 02:06Published Data vs. Reloaded Velocities
  5. 03:46.357 SIG as a Reloader's Cartridge
  6. 04:04Common Reloading Issues for .357 SIG
  7. 04:12Lee Die De-priming Stem Issues
  8. 06:07Neck Tension Challenges in .357 SIG
  9. 07:04Feeling Pressure and Press Mechanics
  10. 07:33Bench Check for Bullet Setback
  11. 08:00Consequences of Bullet Setback
  12. 09:02Lubricating .357 SIG Cases
  13. 10:44Importance of Proper Crimp
  14. 11:55Bullet Profile Requirements for .357 SIG
  15. 13:21Recommended .357 SIG Bullets
  16. 14:24Reloading Process Overview
  17. 15:39Conclusion: Longshot Powder and .357 SIG

Frequently Asked Questions

What are the main challenges when reloading .357 SIG cartridges?

Key challenges include potential issues with de-priming stems on certain dies due to varying case base thicknesses, and critically, achieving sufficient neck tension to prevent bullet setback. Proper bullet profile selection is also vital for maintaining this tension.

How can bullet setback be prevented when reloading .357 SIG?

Bullet setback in .357 SIG is prevented by ensuring adequate neck tension. This is achieved through proper sizing, using appropriate bullet profiles with a long, straight shank, and applying the correct crimp. A bench check is recommended to verify seated bullet stability.

What type of bullets are best for reloading .357 SIG?

For reloading .357 SIG, it's crucial to use bullets with a sufficiently long and straight shank to ensure good neck tension. Recommended profiles include Hornady XTP and Federal V-Crown (125 grain), as they are tailored for this cartridge and provide reliable performance.

Which powder is recommended for reloading .357 SIG?

Longshot powder is highly recommended for reloading .357 SIG. It is considered a great match for this cartridge, offering excellent performance and contributing to the high velocities achievable, making it a preferred choice for enthusiasts.

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