How to Lap Riflescope Rings to Improve Holding Power | MidwayUSA Gunsmithing

Published on April 10, 2008
Duration: 1:09

Lapping rifle scope rings ensures a perfect fit between the scope and the rings, maximizing holding power and preventing finish damage. Using a Wheeler Engineering lapping kit with 220 grit compound, the process involves applying compound to a lapping bar, cycling it through the rings, and checking for consistent contact. Achieving nearly 100% contact is crucial for scope stability and maintaining point of impact.

Quick Summary

Lapping rifle scope rings ensures full, even contact, maximizing holding power and preventing scope finish damage. Use a kit like Wheeler Engineering's with 220 grit compound, cycling the lapping bar through the rings until nearly 100% contact is achieved for stability.

Chapters

  1. 00:00Introduction to Lapping Scope Rings
  2. 00:19Tools and Materials Needed
  3. 00:30The Lapping Process Explained
  4. 00:45Achieving Full Contact for Stability

Frequently Asked Questions

Why is it important to lap rifle scope rings?

Lapping rifle scope rings ensures they make full, even contact with the scope tube. This maximizes holding power, preventing the scope from shifting under recoil, and also protects the scope's finish from being scratched by unevenly machined ring surfaces.

What tools are needed for lapping scope rings?

You'll need a scope lapping kit, such as the Wheeler Engineering kit, which includes a lapping bar that fits your scope diameter and a lapping compound (typically 220 grit). Ensure the rings are securely mounted to the rifle base before starting.

How do you know when scope rings are properly lapped?

Properly lapped rings will show nearly 100% contact marks on both the scope tube and the inside surfaces of the rings after the process. Initially, you'll see only small bright spots; continue lapping until these expand into a consistent, even pattern.

What grit lapping compound is recommended for scope rings?

A 220 grit lapping compound is commonly recommended for lapping scope rings. This grit level is fine enough to remove high spots effectively without being overly aggressive, allowing for precise adjustment and minimizing the risk of removing too much material.

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