Just thought I leave some more info:
Liquid Bore Cleaners
Liquid bore cleaners, such as Shooters Choice MC-7 or Hoppes #9, represent the most common and widely used method of barrel cleaning. In practice, a few drops of solvent are placed on a bronze brush and run through the bore several times. This scrubbing action should effectively loosen both powder residue and mild copper fouling, allowing it to be removed easily with a solvent-soaked patch or two. An alternate method is to use the solvents alone, without resorting to brushes. When using only patches to apply solvent, remember that the solvents work chemically and do not actually require any scrubbing. When solvents are used in this manner, use only a loose-fitting patch. In this instance, the patch serves only as a vehicle to transport solvent into the bore. A patch that fits the bore too tightly will be wrung out, leaving little solvent to do the work.
A word of caution here regarding Hoppes #9 and nickel-plated guns: Use this solvent carefully and quickly as it can frost or strip the nickel plating. We have seen examples of nickeled guns being left to soak for extended periods in this solvent, actually causing the finish to peel and flake off. Yes, Nickel does require some different care. First and foremost, keep Hoppes #9 away from it, and any other copper solvent. Nickel isn't all nickel as its got a base coat or layer that is usually copper. The ammonia in some solvents, if left on the surface, can attack the base chemically. Then the outside layer of shiny nickel will flake off. It'll make your pretty shiny revolver ugly.