Further note on annealing if I might add something to Curly's instructions - note he suggested darkened or slightly darkened room or area. THIS can be quite critical. I know some people do, some don't.
I didn't think of using the electric drill and socket - good idea, that is. I've always held the case in my fingers, helping to prevent over heating the case. You'll usually drop it into the bucket of water before the head area gets too hot.
A darkened area or room helps to "see" the colours changing in the case when applying the heat to them. Once I started doing this, I no longer OVER annealed any cases. An over-annealed or heated to TOO high a temperature, will ruin a case forever. Overheating (too bright red) will make the case too soft & the case will crumple when attempted any sort of sizing, expanding or crimping.
Overheating is easily done if too bright lighting in a room, or outside in the sun.