i have been using corn media for a few years. It gets dusty and dirty but it works. A friend told me about using stainless steel media and a tumbler, using dishwashing soap. Sounds and looks like a viable option for cleaner Brass. I realize there are extra steps but the volume of Brass tumbled is much higher (1000 of 223) than what I can do on my Lyman 1200. Sure it has to be rinsed and then dried. I don't plan to deprime them beforehand since I have a progressive. What's your take and experience?