Controlled or Push Feed ~ A fair look at an old debate

Published on August 21, 2018
Duration: 27:50

This video provides a detailed comparison between controlled-round feed and push-feed bolt action mechanisms. It explains the mechanical differences, historical context, and manufacturing complexities of each system, using examples like the Mauser 98 and Remington 700. The discussion also touches on theoretical impacts on accuracy and the reliability of push-feed designs in modern firearms.

Quick Summary

Controlled-round feed actions trap the cartridge rim against the bolt face from magazine to chamber, ensuring positive control. Push-feed actions push the round into the chamber, with the extractor engaging the rim only upon bolt closure. Controlled feed is mechanically more complex but offers positive control, while push feed is simpler and cost-effective.

Chapters

  1. 00:00Introduction: Controlled Feed vs Push Feed Debate
  2. 01:28Understanding Controlled Feed Mechanism (Mauser Style)
  3. 03:50Controlled Feed Ejection Explained
  4. 06:07How Push Feed Works (Remington 700 Example)
  5. 07:32Push Feed Reliability in Modern Military Arms (AR-15)
  6. 10:30Manufacturing Complexity: Controlled Feed vs Push Feed
  7. 13:00Accuracy Theory: Concentricity and Bolt Pressure

Frequently Asked Questions

What is the main difference between controlled-round feed and push-feed bolt actions?

Controlled-round feed actions capture the cartridge rim as it rises, trapping it against the bolt face throughout the feeding process. Push-feed actions push the cartridge into the chamber, with a spring-loaded extractor snapping over the rim only when the bolt is fully closed.

Are push-feed actions less reliable than controlled-feed actions?

While theoretical concerns exist, push-feed designs like the AR-15 have proven extremely reliable in billions of rounds of combat. Reliability issues are often operational rather than purely design-based, especially in dangerous game hunting scenarios.

Why are controlled-feed bolts more complex to manufacture?

Controlled-feed bolts require more precise machining operations and have more moving parts, particularly the large claw extractor and controlled feed mechanism. This complexity makes them more expensive to produce compared to simpler push-feed designs.

Can bolt action type affect rifle accuracy?

A theory suggests that push-feed actions, with their spring-loaded plunger ejectors, might exert sideways pressure on the cartridge, potentially causing slight misalignment in the chamber. Controlled-feed actions lack this constant plunger pressure, which may allow for better cartridge-to-bore concentricity.

Related News

All News →

More Reviews Videos You Might Like

More from GunBlue490

View all →