Here is what I do. I use a bronze brush to go the the barrel 3 or 4 times to loosen with shooters choice. I then use shooters choice with patches to get out powder fouling. At this point, I take one of two routes. If I have time, I put wipeout foam cleaner in and let it sit at least2 hours. I clean it out and do it again but overnight. Usually at that point, all copper is out.

If I don't go route one, and if I have multple guns, I will probably use CR10, or Sweets or butchs. to clean out copper. I uses to scrub with brass jags, but now use the old plastic patch holders. Brass jags give false indicators that copper is still in there.