Videos tagged with Counterboring

This video explains the process and purpose of counterboring surplus rifle barrels, particularly common on Mosin Nagant rifles. Counterboring involves drilling out the damaged muzzle end of a barrel to create a new, clean crown, which significantly improves accuracy by ensuring a consistent bullet exit. The instructor demonstrates how to identify a counterbored barrel and explains why damaged crowns negatively impact shooting performance.

This guide details the expert gunsmithing process of counterboring a damaged Mauser 1916 rifle muzzle, as demonstrated by Mark Novak. The technique involves using a lathe and precision tools to remove corroded rifling and create a new, safe crown deeper within the barrel, restoring the firearm's integrity without a full barrel replacement.

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.