Re: New Brass, .243 Cracked neck
I used to blow glass as part of my work; nothing artsy--I'd call it "scientific glass-blowing". I also had to use a device called a "Pyrometer" that was used to precisely heat an object to a specific temperature. What was fascinating is the human eye can hit the temperature needed without one, once you have seen the color you are trying to achieve. JLA is correct in his procedure 'though I perform the operation slightly differently. The net result is properly annealed cases that produce more consistent neck tension and more accurate ammunition, with longer case life.
There are a myriad of accuracy techniques that can be used in crafting your handloads that frankly don't benefit someone shooting a production rifle. Annealing cases DO provide benefits to the common handloader which I have demonstrated to my own satisfaction. I would not waste my time on pistol or "plinking" ammo. This is for someone who feels they can derive an improvement in accuracy in their centerfire rifle loads from the bench.
Life's too short to shoot an ugly gun.....