If a brush ruins that rifle it is a rifle I'll learn to live without. My point is this, you could not saw that barrel in half with a brass anything in a normal life time. I will concede that a patch does just fine. I will also point out that a brush will clean better, you don't have to believe it, it is a simple fact though. Rubbing a patch near the fouling that is lodged in the rifling doesn't displace it. Scrubby bubbles are a wonderful thing to watch on TV, but take a good look at your tub, and tell me you couldnt do better with a good scrub brush.
I'm not argueing that patches aren't good enough. My arguement is that a brush is better and won't harm steel when used with even a modicum of intelligence.