How Does It Work: Push Feed vs Controlled Feed

Published on June 30, 2020
Duration: 3:24

This video from Forgotten Weapons, hosted by Ian McCollum, provides an expert-level explanation of the differences between push feed and controlled feed actions in bolt-action rifles. McCollum details their mechanical operation, potential malfunctions, and practical applications, noting that modern rifles often utilize push feed for its faster bolt throw, while controlled feed offers inherent reliability against double feeds.

Quick Summary

Ian McCollum explains that push feed actions push cartridges into the chamber without active gripping until lockup, risking double feeds if short-stroked. Controlled feed actions, like the Mauser, use an extractor to grip the rim immediately, preventing double feeds. Modern rifles often use push feed for speed, while controlled feed offers inherent reliability against certain malfunctions.

Chapters

  1. 00:00Introduction to Feed Actions
  2. 00:16Push Feed Mechanics Explained
  3. 00:43Controlled Feed Mechanics Explained
  4. 01:05Malfunction Risks: Push vs. Controlled Feed
  5. 01:46Ejector Differences: Push vs. Controlled Feed
  6. 02:31Practical Comparison and Conclusion

Frequently Asked Questions

What is the main difference between push feed and controlled feed actions in bolt-action rifles?

The primary difference lies in how the extractor interacts with the cartridge rim. In a push feed, the bolt pushes the cartridge without active gripping until lockup. In a controlled feed, the extractor grips the rim as it feeds, maintaining control throughout the process.

What are the potential malfunctions associated with push feed actions?

Push feed actions carry a risk of double-feed malfunctions, particularly if the bolt is partially cycled and then retracted before being fully locked. This can cause a second cartridge to be pushed from the magazine prematurely.

Which type of bolt action is more common in modern sniper and competition rifles?

Modern military sniper rifles and competition rifles often utilize push feed actions. This is primarily due to the push feed's typically shorter and faster bolt throw, which allows for quicker cycling of the action.

How do the ejectors differ between push feed and controlled feed actions?

Push feed actions commonly feature a spring-loaded plunger ejector mounted directly on the bolt face. Controlled feed actions, conversely, typically use a fixed ejector that is integrated into the receiver, requiring a full bolt stroke for ejection.

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