It's great for getting oil and loose fouling but won't do anything for leading or copper fouling. My cleaning routine involves less and less as time goes on. Wiping surfaces and scrubbing stuck-on fouling with a brass brush and then relubricating is enough. More pistol barrels are ruined by cleaning then anything else so I avoid using solvents and cleaning as much as possible. The barrel seems to get cleaner and shinier the more I shoot it just like Schuemann says.
http://www.schuemann.com/Content/clean0.htm
http://www.schuemann.com/Content/clean0.htm