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

Published on October 18, 2013
Duration: 2:44

This video demonstrates the essential gunsmithing technique of lapping scope rings to ensure proper scope mounting. It highlights how imperfections in ring interiors can damage scopes and affect accuracy. The process involves using a specialized kit to achieve optimal contact between the rings and scope tube, preventing damage and improving holding power.

Quick Summary

Lapping scope rings with a fine abrasive compound improves their holding power and prevents scratching the scope's finish. It corrects imperfections in ring interiors, ensuring 70-80% contact with the scope tube for optimal stability and accuracy.

Chapters

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

Frequently Asked Questions

What is the purpose of lapping scope rings?

Lapping scope rings with a fine abrasive compound improves their holding power and prevents scratching the scope's finish. It ensures the rings make consistent contact with the scope tube, which is crucial for maintaining zero and accuracy.

Why is lapping scope rings necessary even with modern machining?

Even modern scope rings can have imperfections like rough interiors or burs. Lapping corrects these issues, ensuring the rings are concentric and provide uniform support for the scope, preventing potential damage and POI shifts.

What tools are needed to lap scope rings?

You'll need a specialized scope ring alignment and lapping kit, such as the Wheeler Engineering kit. This typically includes alignment bars, a lapping bar, a handle, and abrasive lapping compound (often 220 grit).

How much contact is needed after lapping scope rings?

The goal is to achieve 70-80% contact between the scope rings and the scope tube. 100% contact is not necessary and can indicate over-lapping, which removes too much material.

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