Videos tagged with Barrel Pitting

Preston Moore, demonstrating high expertise, evaluates five Kaiju Rifle Co. Chimera AR-15 barrels from Bad Attitude Department. Despite initial promising specs (16"/12.5", 5.56 NATO, 1:7 twist, 416R stainless steel), borescope inspection revealed severe internal pitting due to improper media blasting. Range testing confirmed poor accuracy (2.4-4.5 MOA) despite high muzzle velocities, with one load completely missing the target. Bad Attitude Department acknowledged the defect, issued refunds, and removed the product.

This guide details the process of backboring shotgun barrels, a gunsmithing technique essential for repairing pitting that cannot be otherwise addressed. Expert instructor Larry Potterfield from MidwayUSA demonstrates how to select appropriate PTG reamers, apply cutting oil, and carefully ream the barrel to restore its integrity. The process is described as demanding but crucial for older firearms.