While i'm waiting for Midway to ship my press and dies, at least i have received my tumbler. On the first run, i used corncob and Brasso. After an hour it looked okay. On the second run, i used "pool filter Sand" (crushed quartz) and no Brasso. It was Squeaky Clean!!! But it was dull and flat, not shiny. It looked sandblasted. Don't know if this will cause any problems, i'll find out when i get my press and finally start loading.