The original article that mentioned the candle method was published by Fred Barker in PRECISION SHOOTING magazine. He developed the method with Tempilaq, and discovered that if he held the case (or whatever size) halfway down its body with the tips of his fingers, then dropped the case when his fingertips got a little too warm, it annealed the necks but left the base pretty much cool.
You do NOT wanted to anneal case heads, because they're supposed to be hard. If you do anneal them, the cases are likely to come apart when fired at typical modern rifle temperatures.
That's why brass manufacturers anneal the neck AFTER the cases are fully formed. The several stages of forming work-harden the rear/head of the case sufficiently to be safe, but make the necks so hard they would tend to split even after one firing.
