I took an old microwave, took it apart and cut out the turn table.
Mounted it on some wood.
Wire it directly to the cord.
Put a pan of water on it. I put a few cubes of ice in it.
I put a X in the center of the pan so I know where to set the shell.
Plug it in and set a shell on the X.
Heat it with a propane torch.
Knock it over when it's time.
I have a small pan, but I can do about 20 shells before I have to empty it.
I polish the brass first so I can see the blue move down the neck.
Got the micro free off craig's list.
Pan was from goodwill.
Propane torch I had.
Total cost $1.00.
I'm planing to make a swinging arm to hold the torch.
Cheap is good.