An overview and demo of the Bob Hahin Bore Guide. A bore guide will keep any solvent that’s on the cleaning patches from getting into the receiver, trigger or bedding of the rifle. It keeps the solvent in the guide and the bore of the rifle where it belongs. Cleaning solvents are very aggressive agents and many of them will do damage to a rifle’s bedding if allowed to seep into the receiver. If a rifle’s bedding is compromised so is its accuracy.