Counterbored Surplus Rifle Barrels
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.











