If cleaning from the muzzle I use a bore guide. I have bottle neck cases I have cut the shoulder and neck from and slip the rod through the neck and that pratects the bore.
In a 30 cal I use a 270 case cut off and it will fit in the bore at the crown. This keeps the rod from rubbing on the end of the barrel.
Have you ever danced with the Devil in the pale moonlight?
A village in Kenya called. They want their idiot back.