Well Red, I used to tumble my brass using walnut media with a polish compound added. They did come out fairly nice except some still had spots of corrosion on them. Plus the media was dickens to get out of 223 cases and they were all covered in a reddish powder. So, I tried a wet tumbler with pins and the brass came out looking brand new, even the primer pockets. The reason for a casr dryer is because this process is a WET media tumbler. I use a case/pin separator to get the pins out of the cases and most of the water. Then into a case dryer set at 160 degrees for about an hour. All my equipment is made by Frankfort Arsenal.