I have a lot of time between range trips so I have a lot of time to clean my brass and get everything squared away for next go-'round. I have a tumbler for my cases and I use brass polish in my media but one thing I cant get over is how dirty the inside of my cases come out no matter how long I leave them in the tumbler. I've found running 0000 steel-wool on a dremel dowel inside them gets the major gunk out but I was wondering if any one might have a good tip for getting them cleaner as the steel-wool approach can be very irritating after a while. My buddy said something about chemical baths for his brass but I havent seen any of his results or know exactly what he does to them. I also read an article on using an ultra-sonic cleaner but that particular one seems a bit more tedious than the steel wool. Currently I'm loading batches of a few hundred 45acp. So how can I get the inside of the cases clean easier?