I would only add that some copper fouling in a barrel isn't necessarily a bad thing. In fact, I would go for months, many months with my rifle barrels and they shot just the same. On a pitted barrel, the fouling actually helps smooth it out. Point being, these 30 cal barrels just don't need to be cleaned to that extent to shoot well. Some match rifles need to be cleaned between shots, some once a year. with these 30 calibers, it just isn't that important to get all excited about it. A hoppies soaked patch followed by a couple of clean ones and done.