The metal that the Chief's Pro Clean is made of is alot softer than any Barrel and it is Not of Such a Tight Fit that it has to be Forse down the barrel.The mere weight of the Ram Rod will puch it down the barrel ounce you have the cleaning tool line up with the grooves and lands.It is one of the Best Cleaning Tools to ever come out.It will keep the Rifling edges SHARP and Clean.Try it and you will never look back