Up100 Hunting 7.62mm Bore Snake Cleaner Gun Cleaning Cal .308 30-30 30-06 .300 .303 .30 Rifle/shotgun Boresnake Extremely portable cleaning ability. Brass weight on the pull cord makes it easy to use. Copper brush will not scratch bore. Material: Copper + Fabric Work for: cal .308 30-30 30-06 .300 .303 .30