I use Wipe-Out foaming bore cleaner after each 70 to 100 rounds on my 6 BR. No brushes! Medium tight patches only. I clean until they come out only slightly gray, then soak overnight, plugging both ends of the barrel. Next day, a few passes with a dry patch. That seems to work well for me. With my R5 in 308 I clean after each match with the same routine, but I also fire several rounds between matches using CFE223 powder to help keep the copper from building up in the barrel.