How to Measure Headspace on a Bolt Action Rifle | MidwayUSA Gunsmithing

Published on October 9, 2017
Duration: 1:28

This video demonstrates how to measure headspace on a bolt action rifle using Go and No-Go gauges. It emphasizes safety by ensuring the firearm is unloaded and the bolt is removed. The process involves inserting gauges into a clean chamber to check if the bolt closes, indicating proper or excessive headspace, crucial for safe operation.

Quick Summary

To measure headspace on a bolt action rifle, use 'Go' and 'No-Go' gauges. Ensure the rifle is unloaded, remove the bolt and extractor. The bolt should close fully on a 'Go' gauge but not on a 'No-Go' gauge; if it closes on 'No-Go', the rifle has unsafe headspace.

Chapters

  1. 00:00Introduction to Headspace Measurement
  2. 00:17Safety and Preparation Steps
  3. 00:37Understanding Headspace Gauges
  4. 00:41Using the Go Gauge
  5. 00:54Using the No-Go Gauge
  6. 01:12Conclusion and Safety Recap

Frequently Asked Questions

What tools are needed to measure headspace on a bolt action rifle?

You will need a set of precision 'Go' and 'No-Go' headspace gauges specific to your rifle's caliber. It's also recommended to have a tool like a magnetic pin or cleaning rod to help remove the gauges from the chamber.

How do you know if a rifle has excessive headspace?

Excessive headspace is indicated if the bolt closes completely on a 'No-Go' gauge. This means the chamber is too deep, and the rifle is unsafe to fire as it could lead to case rupture.

What is the purpose of a 'Go' gauge in headspace measurement?

A 'Go' gauge is used to confirm that the chamber is not too short. If the bolt closes completely on a 'Go' gauge, it means the chamber depth is sufficient for a cartridge to properly seat and the rifle is safe in this regard.

What are the essential safety steps before checking headspace?

Always ensure the firearm is completely unloaded and pointed in a safe direction. It's also crucial to remove the bolt and the extractor from the rifle to prevent any interference with the headspace gauges.

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