I used to anneal cases by placing a pie tin filled half way with water on a kitchen "Lazy Susan" type arrangement and rotating the cases by placing them one at a time in the middle of the tin and turning the it while heating them with a propane torch. When the proper temperature had been reached, I simply tipped them over in the water with the nozzle of the torch.

Nowadays I heat the cases using an induction coil and holding them in my fingers. I drop them into water and use a case drier to dry them out afterwards.