Quick Tip: What Is "Blueprinting" an Action?

Published on June 3, 2021
Duration: 4:15

This video explains the process of 'action blueprinting' or 'action truing,' a gunsmithing technique to ensure maximum accuracy and reliability in bolt-action rifles. It involves precisely aligning and matching critical components like the barrel threads, receiver shoulder, recoil lug, and bolt lugs. High-end custom actions are often pre-blueprinted from the manufacturer, contributing to their higher cost.

Quick Summary

Action blueprinting, or truing, is a gunsmithing process that precisely aligns critical rifle action components like the barrel shoulder, receiver threads, and bolt lugs to ensure perfect concentricity with the bore. This meticulous work maximizes accuracy and reliability, and is often a feature of higher-cost custom actions.

Chapters

  1. 00:00Introduction to Action Blueprinting
  2. 00:47Truing the Barrel and Receiver
  3. 01:51Bolt and Receiver Lug Alignment
  4. 02:41Benefits and Custom Actions

Frequently Asked Questions

What is the primary goal of blueprinting a rifle action?

The primary goal of blueprinting, or truing, a rifle action is to ensure all critical components, such as the barrel threads, receiver shoulder, and bolt lugs, are perfectly concentric with the bore. This precise alignment maximizes accuracy and enhances the rifle's overall reliability.

Which parts of a rifle action are typically trued during blueprinting?

During action blueprinting, key components trued include the barrel shoulder and threads to match the receiver, the receiver's threads and shoulder, and the bolt lugs. The recoil lug must also be perfectly flat, as it interfaces between the barrel and receiver.

Why are pre-blueprinted custom actions more expensive?

Pre-blueprinted custom actions are more expensive because they undergo meticulous machining processes from the manufacturer to ensure perfect concentricity and alignment of all critical parts. This precision gunsmithing significantly enhances accuracy and reliability, adding to the production cost.

How can bolt lug wear indicate a need for action truing?

Visible wear marks on the back of bolt lugs suggest uneven contact within the receiver. Truing the bolt lugs ensures full, consistent contact with the receiver shoulder, which is essential for smooth operation and predictable recoil management.

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