Well, at the end of the season I went on to clean my rifled barrel... And I run patch after patch for 3 hours, using otis hunters system and Hope9 solvent... Patch, Brush, Patch and they are coming out dirty and dirtier... I cannot understand it. Since I bought this barrel new and installed on my gun, I haven't shot more than 20 slugs. And I did use boresnakes here and there... Could it be extreme fouling, or am I doing anything wrong? The bore looks totally clean BTW, but it looked totally clean even before I started.