Does anyone have any experience good or bad with the electrochemical gun cleaning kits out there like the Outers Foul Out kits or the like? I've got an old Remington 788 in 22-250 that I got from my old man. It used to remove rabbit heads past 100 yards but now I can't get satisfactory groups with it. I've gone several rounds of cleaning it and I get a ton of copper fouling out each time but the groups have yet to improve. I'm thinking about purchasing one of these kits to get the bore "clean" but at over $100 I'd like to know if they're for real or not.