Brownells Chamber Hone Features The Brownells .308 Winchester Chamber Hone relies on a twisted steel shaft fitted with 400 grit silicon carbide abrasive balls that polish away roughness inside the chamber. As the tool is worked back and forth it smooths out scoring and imperfections that commonly cause cases to stick during extraction. The process typically takes only a few minutes offering a fast alternative to a full chamber reaming job. Because the abrasive is relatively fine it refines the surface finish without removing excessive material from the chamber walls. Brownells requires the hone be used with Flex Hone oil to work correctly and protect the chamber surface throughout the process and instructions are included for a straightforward at-home job. This hone is part of a broader lineup that also covers .223/5.56 and pistol calibers giving shooters a consistent tool option across chamberings. Anyone experiencing sticky extraction or difficult cycling on a .308 Winchester rifle can use this hone before assuming a more serious repair is needed. It is a practical low-risk first step for resolving chamber-related feeding issues. Brownells Chamber Flex Hone Specifications Brand: Brownells Caliber: .308 Win Grit: 400 Available At: GrabAGun