Anvil 087: Sharps Borchardt .45/120

Published on September 10, 2020
Duration: 22:26

This guide details the precision machining process for installing sights on a Sharps Borchardt rifle, as demonstrated by a master gunsmith. It covers cutting a dovetail on an octagonal barrel and mounting a Lyman front sight and a reproduction Malcolm scope, including specialized gunsmithing techniques for secure installation. The instruction emphasizes meticulous measurement and careful execution for optimal results.

Quick Summary

Master gunsmith Mark Novak demonstrates precision machining for sight installation on a Sharps Borchardt .45/120. The process includes cutting a dovetail on an octagonal barrel using a milling machine and specialized cutters, followed by mounting Lyman and Malcolm sights. Techniques for secure installation, like interference fits for rear sight bases, are detailed.

Chapters

  1. 00:00Introduction to Sharps Borchardt .45/120
  2. 00:55Sight Selection and Placement Theory
  3. 03:22Dovetail Machining Theory
  4. 07:06Machining the Barrel
  5. 13:09Mounting Sights and Scope
  6. 18:14Range Testing and Cartridge Scale

Frequently Asked Questions

What is the process for installing sights on a Sharps Borchardt rifle?

The process involves precision machining of the barrel to cut a dovetail, followed by installing the front sight. Rear sight bases are tapped for screws, often using specialized techniques like interference fits for secure mounting. This requires advanced gunsmithing skills and specialized tools.

What are the key considerations for sight selection on a .45/120 rifle?

For a .45/120 with its extreme trajectory, reliable open sights are crucial. Reproduction scopes may have limited vertical adjustment, making them less ideal for long-range shooting compared to well-placed iron sights. Sight placement also considers rifle balance and shooter's eye position.

What specialized machining techniques are used for dovetail cutting on a rifle barrel?

Dovetail cutting involves a two-step process: initial material removal with a straight mill, followed by precise shaping with a 60-degree dovetail cutter. Slow, careful passes with ample lubrication are essential, along with precise digital readout adjustments for width and depth.

How can a gunsmith ensure a permanent thread lock for sight bases?

A gunsmithing trick involves using an 8-36 tap for an 8-40 screw. This creates an interference fit, effectively acting as a permanent thread locker without the need for adhesives, ensuring the sight base remains securely in place under recoil.

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