While it is nice to experiment, brass hardening will cause your accuracy to suffer before the case fails. If you are just punching paper at 100 yards, no big deal. However, if you are shooting across the course, your name won't be at the top of the list.
I learned how to anneal cases in the seventies from some guys in their seventies.
I still use it for my 8mm and 30-06 cases and it is as simple as you can get.
I set up a stool next to a five gallon of water in a room in my basement. I light up the propane torch and shut the lights out. I sit on the stool and roll a case in my fingers while playing the torch on the neck at the first hint of color, I drop the case in the water. Water isn't really needed for brass but it keeps the softer necks from being damaged.
I have also experimented with using 650* Tempilaq sticks and found no difference in case life or accuracy during the usefull life of the case. Mind you, in my days as a Cast Bullet Association shooter, we did all the experiments that you young folks are just getting around to.
It was fun for me and I'm sure it is fun for you so enjoy the other side of shooting too.
I use RCBS X dies for my .223 and 30/30 cases and have found them to keep the case stretch down to where i seldom find oversize cases. I would not use these for precision shooting but they are fine for what I do with those two cartridges.