I anneal with the drill and socket method. I use a propane torch with pencil head flame tip, and get everything set up on my reloading table and spin the case neck at the tip of the flame (IN DARK) until I see the neck just start to turn color. The color is like an earth worms head. Not bright red.

I usually do this every other firing. The reason I anneal is because it improves bullet seating pressure on all of my competition loads. If you don't anneal, after many firings you will get fliers. YMMV