How to Lap Scope Rings Presented by Larry Potterfield | MidwayUSA Gunsmithing

Published on October 18, 2013
Duration: 2:44

Larry Potterfield, an expert gunsmith, demonstrates the essential process of lapping scope rings to ensure proper scope mounting and prevent damage. This guide covers the necessary tools, setup, and step-by-step technique for achieving optimal scope-to-ring contact, crucial for rifle accuracy and scope longevity. The video emphasizes correcting imperfections in modern scope rings for a secure and scratch-free fit.

Quick Summary

Lapping scope rings corrects machining imperfections for a perfect fit, improving holding power and preventing scope scratches. Use a kit like Wheeler's with 220 grit compound, aiming for 70-80% contact. Secure the rifle in a vise, check alignment with bars, apply compound, and lap evenly. Thoroughly clean afterward.

Chapters

  1. 00:00Introduction to Lapping Scope Rings
  2. 00:14Why Lapping is Necessary
  3. 00:37Tools and Setup for Lapping
  4. 00:50Alignment Check Procedure
  5. 01:16Preparation and Compound Application
  6. 01:57The Lapping Process Technique
  7. 02:09Checking Progress and Contact
  8. 02:34Cleaning and Final Assembly

Frequently Asked Questions

What is the purpose of lapping scope rings?

Lapping scope rings corrects machining imperfections, ensuring a perfect fit between the rings and the scope tube. This improves holding power, prevents scratching the scope's finish, and contributes to overall rifle accuracy by eliminating stress points.

What tools are needed to lap scope rings?

You'll need a specialized kit like the Wheeler Engineering Scope Ring Alignment and Lapping Kit, which includes alignment bars, a lapping bar, handle, and lapping compound. A padded bench vise is also essential for securing the rifle.

How much contact should be achieved when lapping scope rings?

The goal is to achieve 70-80% contact between the scope rings and the scope tube. 100% contact is unnecessary and can indicate over-lapping, which removes too much material.

What grit of lapping compound is recommended for scope rings?

A 220 grit lapping compound, such as Wheeler 220 Grit Lapping Compound, is recommended. This grit level is effective for removing imperfections without being overly aggressive, allowing for controlled material removal.

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