Outers Gun Cleaning Gun Cleaning Problems?

Gun cleaning problems? - outers gun cleaning

338 Win Mag for largely failed (I think) after 27-30 shots, the best selection of solvents or handles Outers Nitro Solvent? I have both, and after 30 minutes of washing and saturation Barel, I can not without a patch for the green channel, one can never Barel as clean a patch of clean?