BS!! Boresnakes are great if you dont drag the string across the crown like a retard .. Many high level competition and benchrest shooters use boresnakes , these are people who depend on accuracy for their livelihood .. Also bore snakes are more for bore preservation between shooting not real cleaning that can only be done with a rod and copper cutter. Using a rod on a barrel every time after you shoot is stupid , this should be done every 700 to 1000 rounds only. boresnakes are great for in between just to knock the carbon out . .. Fabric will wear steel way less than a soft metal like brass or aluminium .. Ask any gunsmith , the most common cause of premature barrel wear is improper too frequent cleaning rod usage.