30 Super Carry and Truth About Chamber Pressure

Published on January 11, 2022
Duration: 10:40

This video debunks the myth that high chamber pressure alone causes excessive wear on firearms, particularly the new 30 Super Carry. The instructor explains that wear is primarily influenced by the firearm's recoil spring system and the timing of the slide's reciprocation. He uses slow-motion footage and comparisons to other calibers like 9mm, 40 S&W, and 5.7x28mm to illustrate how pressure is managed and why a properly sprung firearm can handle higher pressures without premature wear.

Quick Summary

Excessive wear on firearms is primarily caused by an inadequate recoil spring system, not solely by high chamber pressure. A properly sprung firearm can handle high pressures because the bullet exits the barrel before the slide fully disengages, significantly reducing pressure on components.

Chapters

  1. 00:10Introduction: 30 Super Carry Feedback
  2. 00:34The Misconception of Chamber Pressure and Wear
  3. 01:17Slow-Motion Firing Analysis
  4. 02:02Slide and Barrel Disengagement
  5. 02:39When Chamber Pressure Becomes an Issue
  6. 03:06Understanding Pressure Containment
  7. 04:08Newton's Third Law in Firearms
  8. 04:24Force vs. Slide Movement
  9. 05:05The Role of the Recoil Spring
  10. 05:32Consequences of an Undersprung Gun
  11. 06:04Proof Testing and Chamber Design
  12. 06:28Caliber Size and Chamber Mass Comparison
  13. 06:59AR-15 Bolt Comparison: 7.62x39 vs. 5.56
  14. 08:285.7x28mm and High Pressure
  15. 08:46Conclusion: What Causes Firearm Wear
  16. 09:46Final Thoughts and Call to Action

Frequently Asked Questions

Does high chamber pressure damage firearms?

Not necessarily. While high chamber pressure is a factor, excessive wear on a firearm is primarily caused by an inadequate recoil spring system. A properly sprung firearm can handle high pressures without premature wear, as the bullet exits the barrel before the slide fully disengages.

What is the main cause of excessive wear in firearms?

Excessive wear in firearms is most commonly attributed to an undersprung recoil system. If the recoil spring is too light, the slide reciprocates too quickly, leading to increased stress and wear on the firearm's components, regardless of the ammunition's chamber pressure.

How does the recoil spring affect firearm wear?

The recoil spring is designed to manage the slide's backward movement and return it forward. A recoil spring that is too weak (undersprung) allows the slide to slam back with excessive force, causing accelerated wear on the frame, slide, and other internal parts.

Are firearms proof tested for high pressure?

Yes, firearm chambers are proof tested. This involves firing rounds that generate pressures significantly higher than standard SAAMI specifications. This process ensures that the firearm is structurally sound and can safely handle normal operating pressures.

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