Fixing Failures with the Sig P365-380

Published on November 29, 2023
Duration: 11:22

This guide, based on expert analysis from Lucky Gunner Ammo, details how to troubleshoot failures to eject in the Sig P365-380. It emphasizes understanding the interplay between ammunition choice, grip technique, and firearm mechanics like slide velocity. The video uses high-speed camera analysis to illustrate how factors like bullet weight and type (JHP vs. FMJ) impact reliability, offering practical advice for selecting and testing carry ammunition to ensure consistent performance.

Quick Summary

Troubleshooting Sig P365-380 failures involves understanding ammunition sensitivity and grip impact. The .380 ACP cartridge's limited energy makes the pistol's locked-breech system sensitive. Heavier bullets (90gr+) and JHPs often cycle better. A firm grip is crucial, as a loose grip reduces slide velocity, leading to ejection issues. Test at least 100 rounds of your chosen carry ammo.

Chapters

  1. 00:02Introduction: Sig P365-380 Review
  2. 00:28P365-380 vs 9mm P365 Comparison
  3. 00:53Reliability Issues with Modern .380s
  4. 01:25Initial Testing and Failures to Eject
  5. 01:54Soft Grip and Cycling Issues in .380s
  6. 02:36Simulating Malfunctions and Comparative Tests
  7. 03:42High-Speed Footage: Slide Velocity and Ejection
  8. 05:02Mechanism of Weak Ejection and Failures
  9. 05:37Threshold for Reliable Ejection
  10. 06:10Ammo Energy vs. Reliability (Federal Lead-Free)
  11. 06:39Bullet Weight's Impact (Federal HST)
  12. 07:23Ammo Selection and Reliability Predictability
  13. 08:01Test Limitations and Disclaimers
  14. 08:39Key Trends in Reliability for .380 Pistols
  15. 10:10Recommendations for Carry Ammo Testing
  16. 10:47Conclusion: P365-380 Shootability and Testing Effort

Frequently Asked Questions

What causes failures to eject in the Sig P365-380?

Failures to eject in the Sig P365-380 can stem from ammunition sensitivity, a weak or inconsistent grip, insufficient lubrication, or manufacturing tolerances. The .380 ACP cartridge has limited energy, making the pistol's locked-breech system borderline reliable under suboptimal conditions.

How does grip affect the Sig P365-380's reliability?

A loose or weak grip on the Sig P365-380 can significantly reduce slide velocity. This slower slide movement may prevent the spent casing from being ejected forcefully enough, leading to failures to eject or stovepipe malfunctions.

What type of .380 ACP ammunition is recommended for the Sig P365-380?

Testing indicates that heavier-for-caliber bullets (90-grain and above) and jacketed hollow points (JHPs) tend to cycle more reliably in the Sig P365-380 compared to lighter FMJ rounds. It's crucial to test your chosen carry ammo extensively.

Is muzzle energy a good indicator of reliability for .380 ACP?

No, muzzle energy alone does not directly determine slide velocity or reliability. Factors like powder burn rate, bullet design, and case dimensions play a crucial role. Testing different ammunition types is essential for optimal performance.

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