How to Open a Fixed Choke on a Parker Shotgun | MidwayUSA Gunsmithing

Published on May 10, 2013
Duration: 1:48

This video details the process of opening fixed chokes on a Parker shotgun using a specialized reamer. It explains how to measure existing choke, prepare the tool with custom bushings for precision, and carefully ream the barrel to achieve desired constriction levels like Improved Cylinder or Modified Choke. Proper lubrication and controlled pressure are emphasized for safe and effective modification.

Quick Summary

To open fixed chokes on a shotgun, use a specialized reamer with custom centering bushings for precision. Apply generous cutting oil and light pressure while turning the reamer clockwise through the barrel to reduce constriction and achieve desired patterns like Improved Cylinder or Modified.

Chapters

  1. 00:00Introduction to Shotgun Chokes
  2. 00:15Measuring Current Choke
  3. 00:31Tooling and Preparation
  4. 00:58The Reaming Process
  5. 01:27Achieving Specific Choke Sizes

Frequently Asked Questions

What is the purpose of opening fixed chokes on a shotgun?

Opening fixed chokes allows a shotgunner to modify the barrel's constriction at the muzzle. This can result in improved shot patterns tailored for specific hunting distances or shooting disciplines, offering more versatility than a permanently fixed choke.

What tools are needed to open a fixed shotgun choke?

To open a fixed choke, you'll need a specialized adjustable reamer, custom bushings to center the reamer shaft accurately in the bore, a T-handle for manual operation, and cutting oil for lubrication.

How do you ensure precision when reaming a shotgun barrel?

Precision is achieved by using custom bushings to perfectly center the reamer shaft within the barrel's bore and chamber. This alignment prevents the reamer from cutting unevenly, ensuring a consistent and accurate modification of the choke.

What are the target choke sizes mentioned for the Parker shotgun?

The Parker shotgun barrels were modified to achieve specific choke constrictions. The right barrel was opened to Improved Cylinder (approximately 0.007 inches of constriction), and the left barrel was opened to Modified Choke (approximately 0.015 inches of constriction).

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