Brownells Chamber Hone Features The Brownells .243 Winchester Chamber Hone relies on 800 grit silicon carbide abrasive balls mounted on a twisted steel shaft that flexes to follow the chamber s exact contour. As the hone is worked back and forth it removes fine roughness that causes cases to drag or stick during extraction. This finer grit produces a smoother final surface than a coarser hone alone which is especially useful once major scoring has already been addressed. A smoother chamber directly improves extraction reliability reducing the chance of a stuck case interrupting a shot sequence. Use with Flex Hone oil is required to protect the chamber surface and let the abrasive work correctly and Brownells includes instructions for a simple at-home process. This hone is part of a broader lineup covering rifle and pistol calibers giving shooters consistent tooling across their collection. Hunters and precision shooters running a .243 Winchester rifle can use this hone to fine-tune extraction before a hunting season or match. It offers a low-cost way to eliminate a common source of cycling frustration. Brownells Chamber Flex Hone Specifications Brand: Brownells Caliber: .243 Win Grit: 800 Available At: GrabAGun