As some of you may know, I bought a Mossberg 590 about 2 weeks ago. I was having trouble with it, because it was not cycling correctly. The shells were not coming out of the mag tube. Evidently it was the shell interrupter, because I worked on it and now I sat in front of the TV and cycled about 300 shells through it without a single FTF. GREAT----but it is remarkably dirty. I have cleaned it four times now and the rags are still coming away black. I have nearly used an entire bottle of Hoppes #9 (a big one) in the action and the barrel. And a can of gun scrubber and carb cleaner for the barrel alone. I can get the action clean for the most part but the barrel will not clean properly. In fact, I even put a bore brush on the end of a drill and ran it through while pouring carb. cleaner down it. Still wont come clean. The barrel looks like it is pitted. And no matter what I do, the patches still come out of the barrel BLACK as night. I am not kidding, a whole bottle and then some, nearly all in the barrel. I even put a S.O.S. pad down it and scrubbed on it???? It will not get shiny and still looks dull and pitted. It was NIB and am amazed so far with the lack of quality in this supposed "top notch weapon." I have a Rem 870 and the barrrel is as bright and shiny as a mirror. I apologize for this long post but I need to emphasize this. Any suggestions of tips??? Anyone with like experiences????? thank you.