Brownells - Jack Rowe, Master Gunsmith Series, Barrel Attachment: Part 1

Published on March 24, 2010
Duration: 6:23

This video, part of the Brownells Jack Rowe Master Gunsmith Series, details various methods of barrel attachment for double-barreled firearms. It explains the construction of monobloc barrels, the differences between round bar and choate tubes, and the techniques of shoe lump and dovetail lump construction. The process of provisional proofing at the Birmingham Proof House, including the 'hotting' process and the purpose of threads in the barrels, is also discussed.

Quick Summary

Master Gunsmith Jack Rowe explains various barrel attachment methods for double-barreled firearms, including monobloc, shoe lump, and dovetail lump construction. He also details the 'hotting' process for provisional proofing using threads at the Birmingham Proof House.

Chapters

  1. 00:10Barrel Attachment Basics
  2. 00:21Barrel Tubes: Round Bar vs. Choate
  3. 01:17Monobloc Barrel Assembly
  4. 01:45Shoe Lump Construction
  5. 03:02Dovetail Lump Construction
  6. 03:20Machining and Finishing
  7. 04:00Provisional Proofing Threads
  8. 04:24The 'Hotting' Process
  9. 05:13Purpose of Provisional Proofing
  10. 05:34Modern Proofing Practices

Frequently Asked Questions

What are the different methods for attaching barrels on double-barreled shotguns?

Key methods include monobloc construction, where barrels are formed from a single piece of steel. Other methods involve joining separate tubes, such as the shoe lump technique common in German guns, and the dovetail lump technique, often seen as a stronger option.

What is the purpose of the threads found at the end of some shotgun barrels?

These threads are for a process called 'hotting,' used during provisional proofing at facilities like the Birmingham Proof House. A plug with a touch hole is screwed in to allow ignition of black powder for testing the barrel's integrity before final assembly.

What is provisional proofing in gunsmithing?

Provisional proofing is a test performed on barrels before they are fully assembled into a firearm. It uses proof loads to ensure the barrels can withstand pressure, preventing gunmakers from wasting time on potentially defective components.

What is the difference between round bar tubes and choate tubes in barrel making?

Round bar tubes are the basic, unshaped cylindrical stock. Choate tubes are specifically shaped to fit together, often with interlocking joints like dovetails, to form the complete barrel assembly for a firearm.

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