I don't clean brass for my hunting rifles although like others I sometimes use 0000 steel wool on the necks. But .223 range brass that has rolled around in dirt and gravel on the range, and perhaps been stepped on and ground into the mud, can get pretty dirty. There might be a case for cleaning this type of brass. I don't think that's what most people are discussing here, but range brass that gets really dirty may benefit from some cleaning.
