Ask Ian: Analyzing the Savage Rotating Barrel (at 7500 frames/sec)

Published on August 23, 2022
Duration: 7:54

This analysis of the Savage Model 1907, led by firearms expert Ian McCollum, delves into its unique rotating barrel delayed blowback system. Using high-speed photography at 7500 frames per second, the video empirically demonstrates how the barrel rotates approximately 5 degrees during the slide's rearward travel. This mechanism, designed by Elbert Searle, allowed for a lighter slide compared to traditional locked-breech designs and was intended to circumvent existing patents. The analysis confirms it is a delayed blowback, not a locked breech system.

Quick Summary

The Savage Model 1907 features a unique rotating barrel delayed blowback action. Expert analysis using high-speed cameras at 7500 fps confirms the barrel rotates approximately 5 degrees during slide travel, distinguishing it from a locked breech system and allowing for a lighter slide.

Chapters

  1. 00:00Introduction: Savage 1907 Locked Breech Question
  2. 01:13Mechanical Disassembly and Barrel Rotation
  3. 03:02High-Speed Camera Analysis (7500 fps)
  4. 06:00Conclusion: Delayed Blowback Confirmed & Comparison

Frequently Asked Questions

What type of action does the Savage Model 1907 use?

The Savage Model 1907 uses a rotating barrel delayed blowback action. High-speed footage confirms the slide begins moving rearward while the bullet is still in the barrel, distinguishing it from a locked breech system.

How does the Savage Model 1907's rotating barrel work?

In the Savage Model 1907, the barrel rotates approximately 5 degrees during the slide's rearward travel. This rotation is part of a delayed blowback system, where bullet friction against rifling was intended to resist rotation and keep the breech closed until pressure dropped.

Why did Savage Arms use a rotating barrel in the Model 1907?

The rotating barrel mechanism in the Savage Model 1907 was designed by Elbert Searle, partly to circumvent existing firearm patents. It also allowed for a lighter slide compared to traditional locked-breech designs.

What is the difference between a locked breech and a delayed blowback system?

A locked breech system mechanically locks the barrel and slide until the bullet exits, while a delayed blowback system uses mechanical means to retard the slide's opening, allowing pressure to drop before the breech fully opens. The Savage 1907 is an example of the latter.

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