To thoroughly clean a barrel I find it necessary to first use a good powder solvent such as Shooter's Choice, MPro-7, TM Solution, etc... followed by a good copper solvent such as Barnes CR-10, Wipeout,KG-12 or Montana Extreme 50BMGto namea few. However, I don't always clean for both types of fouling when I do clean. If the rifle is shooting okay I may not bother cleaning the copper fouling. Of course, if the rifle is shooting fine I guess it wouldn't really be necessary to cleanthe bore at all. I guess the best advice I could give is to shoot your rifleuntil you become familiar with it enough to know when and how often it needs a thorough cleaning. Personally, I find that I don't clean mine nearly as much as I used to. It's just not necessary.