I know this has been covered but I thought I would post my observation's. I bought a bag of "lizzard litter" Zilla ground walnuts and added to it the usual amount of Dillon case polish. The walnut media works quite a bit faster than the corn cob. It got the brass just as shiny but the color is a little more blond. The corn cob seems to leave the brass a little yellower. Has anyone tried a 50/50 mix of the two ?