Mail Call #7

Published on May 3, 2018
Duration: 42:18

This video is a mail call episode where Iraqveteran8888 answers viewer questions. One question addresses a Mosin Nagant M44 rifle with good headspace but where the bullet appears to not be visible when dropped into the barrel. The hosts explain this is likely due to counterboring, a process to improve accuracy on worn barrels by recessing the crown. They detail how to identify counterboring by looking down the barrel with a light and explain its purpose in extending the usable life of a barrel.

Quick Summary

If a bullet dropped into your Mosin Nagant M44 barrel isn't visible at the muzzle, it likely indicates the barrel has been counterbored. This process recesses the barrel's crown to improve accuracy on worn barrels. You can check for counterboring by looking down the barrel with a bright light for a visible step.

Chapters

  1. 24:44Mosin M44 Barrel Question
  2. 25:00Counterboring Explained
  3. 25:14What is Counterboring?
  4. 25:30How to Check for Counterboring
  5. 25:40Purpose of Counterboring
  6. 26:07Barrel Wear vs. Counterboring

Frequently Asked Questions

What does it mean if a bullet isn't visible at the end of my Mosin Nagant M44 barrel?

If a bullet dropped into the chamber of your Mosin Nagant M44 is not visible at the muzzle, it likely means the barrel has been counterbored. This is a common modification to improve accuracy on worn barrels by recessing the crown.

How can I tell if my Mosin Nagant rifle barrel has been counterbored?

To check for counterboring, use a bright light and look down the barrel from the muzzle. You should be able to see a distinct step or change in the rifling where the crown has been recessed deeper into the barrel.

What is the purpose of counterboring a rifle barrel?

Counterboring is done to improve the accuracy of a firearm with a worn or damaged barrel. By recessing the crown, it can help create a better seal and more consistent projectile exit, effectively extending the barrel's usable life without a full re-barrel.

Is counterboring a bad thing for a Mosin Nagant rifle?

Counterboring is not inherently bad; it's a repair or modification to improve accuracy on an otherwise worn barrel. While it indicates wear, a properly counterbored barrel can still be a good shooter and is often preferable to a completely shot-out barrel.

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