Are the brass brushes really necessary that are included in gun cleaning kits? It seem to me they are very abrasive and a patch saturated with Hoppe's #9 Powde Solvent would sufice in a sufficient cleaning. From time to time I see barrels for sale on Ebay (WHEN EBAY GETS RELAXED) could this be barrels are getting worn down especially at the breech with too much clearance. On my last cleaning I used just patches one douched with Hoppe's Powder Solvent two to get it clean and one with a little Hoppe's gun oil to coat the barrel. Just a thought.