I have tumbled my brass with both the corn mash and walnut - not happy with that. I then bought a sonic cleaner, and about the same. I then bought into the Franklin steel pin cleaning system, and what a difference!! They almost look newer than factory and everything is clean. I decap all my brass before cleaning so the primer holes get the benefit of that. I did notice one thing with 6.5 brass - once in a while one of the pins will get stuck crossways in the case mouth, so have to watch for that. Usually it's only 3-4 cases out of a batch of 100 or so. As for drying the cases, I use Franklin's dryer, works very well. The system process takes a bit longer, but it is worth it.