Crayon method (looks like it would work for me):
Put the case in a chuck and mark around the case with a 665 Fahrenheit welding crayon, just below where you will apply the heat. Apply heat with a propane torch, turning case evenly; until the crayon melts or changes color when the correct temperature is reached (whichever it is supposed to do). Douse the case in water. The crayon would probably work for folks like me whose welding and torch experience is pretty much limited to junior high school metal shop and then a high school agricultural welding class - some 55+ years ago.
(Blue? What shade of blue? Isn't this torch thing the same device I used to make some creme brulee?)

Molten lead method:
Dip case in mica, then molten lead for a short time, if you know what you are doing; remove any
lead residue, then tumble lightly. I don't know too much about this method.
Ed Harris (legendary gunwriter) method:
Heat the cases with a propane torch, "holding them in my hand" then "drop in a water bucket as they transition from dull red to cherry, about six seconds. That takes some practice and judgement, but if you don't burn your fingers the case will not get too soft, as long as you are doing a case 2" or longer." (Way too much "art" instead of "science" for me).
Having pretty much exhausted my knowledge of annealing - what do you say?
Do you do it? For what calibers? How often or when? And using which method?