Dear Pat and interested others,
I have reloaded ammunition for a long time. The “brass” or cartridge
part is tumbled to clean and restore brightness. This is never done
with wet tumbling or steel shot. You see, the little hole at the
bottom of the brass is for the primer, the ignitor for the
propellent. No reloader wants a steel shot in that hole! All is
done generally with dry media. These tumblers are for the most part
vibratory though some older ones are rotary. Most are the same as
used for lapidary and jewelry tumbling. I suspect some are made by
the same companies, such as Raytec, etc. The same vib tumbler I use
for cartridge cases is just fine for jewelry. This is a Raytec
model. This is the way to go without the expense of higher priced
though perhaps tumbling methods. Still, the vib tumblers beat the
socks off rotary ones in a flash!
Thanks for hearing my words, Thomas.