For the most part, my guns have come to me clean or NIB, which is a condition I've strived (as I imagine most of us do) to maintain. Generally, I start with a well-known brand of barrel cleaner solvent/lubricant, patch first. I prefer to dip my brushes before I send them down the bore, but you have to be careful, a crusty, dirt laden brush will contaminate your solvent bottle. Then a patch or two, to see how clean the barrel is getting. If it's not clean yet I send a swab in saturated with solvent. Then another saturated brush. Then a few more patches, to check progress. I'm not happy till I bore-sight a shiny, clear barrel. Then I run a favorite oil (really don't want to digress to brand arguments here) saturated on a double patch through one last time, watching carefully for anything but a clean patch coming back. But I came across a badly copper-fouled barrel which has had me busier on it than all other guns combined. I had hoped it will be helpful, to many of us, to see what our other members do to maintain their firearms in good condition.