RE: Corn vs. Walnut media
I use walnut to clean cases as soon as they come back from the range. After resizing, I then switch to treated corncob in order to remove all case lube and to give the shells a nice polish.
Either will get the job done, but walnut seems to kick up so much more dust that I hate to use it as a final cleaning before loading.
"Every moving thing that liveth, I give unto you as meat" (Gen 9:3)
Trust God..........but keep your powder dry!