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

Published on August 21, 2018
Duration: 27:50

This video provides a balanced look at the controlled-round feed versus push-feed bolt action debate. The speaker, demonstrating high expertise, explains the mechanical differences using examples like the Mauser 98, Winchester Model 70, Remington 700, and AR-15. Key takeaways include how each system feeds and ejects cartridges, manufacturing complexities, and potential impacts on accuracy.

Quick Summary

Controlled Round Feed (CRF) actions, like the Mauser 98, capture the cartridge rim early, guiding it into the chamber for maximum reliability. Push Feed actions, like the Remington 700, push the cartridge into the chamber, with the extractor engaging later; they are simpler and cheaper to manufacture but may offer less positive control in adverse conditions.

Chapters

  1. 00:00Introduction: The Bolt Action Debate
  2. 01:28Controlled Feed Mechanism Explained (Arisaka/Mauser)
  3. 03:50Controlled Feed Ejection
  4. 06:07Push Feed Mechanism Explained (Remington 700)
  5. 07:32Push Feed in Modern Military Arms (AR-15/M16)
  6. 10:30Manufacturing Complexity and Cost Comparison
  7. 13:00Accuracy and Concentricity Theory

Frequently Asked Questions

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

Controlled Round Feed (CRF) captures the cartridge rim early, guiding it into the chamber, exemplified by the Mauser 98. Push Feed pushes the cartridge into the chamber, with the extractor engaging later, as seen in the Remington 700. CRF offers more positive control, while Push Feed is simpler to manufacture.

Which bolt action type is more reliable: controlled round feed or push feed?

Controlled Round Feed is generally considered more reliable in adverse conditions or for dangerous game due to its positive control over the cartridge rim from feed to extraction. Push Feed actions, while simpler and cost-effective, can be more susceptible to feeding issues if debris is present or the bolt isn't operated correctly.

Why did manufacturers like Winchester switch from controlled round feed to push feed?

Manufacturers like Winchester transitioned from controlled round feed to push feed actions (e.g., the 1964 Model 70) primarily for cost-effectiveness. Push feed designs are simpler and cheaper to manufacture due to less complex machining and fewer parts, allowing them to compete more effectively with designs like the Remington 700.

Can push feed actions affect rifle accuracy?

There's a theory that the constant pressure from a push-feed's plunger ejector might slightly misalign the cartridge in the chamber, potentially impacting extreme precision. Controlled-feed actions lack this plunger pressure, which some believe allows for better cartridge-to-bore concentricity, though this is a subtle point.

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