First post here, hello everyone. I bought a 12 LRPV in .223 and some Butch's bore shine for cleaning. The instructions on the Butch's say that patches turning blue would indicate copper build up. I've seen that blue color when cleaning a Garand. I've got about 400 rounds down the new 12 and have cleaned after every session of between 90-100 shots. I've never seen any blue on any patch. Is that unusual or is the Butch's not really designed for removing copper. Thanks