Re: how often do you anneal
I anneal after the 2nd firing on my 300wm brass. If you wait too long to anneal there are lots of things that change. For example, your neck tension will be very different if you wait too long and, you'll find that your sizing operation is very different... especially if you neck size separately. ( which I do )
I'm sure I could get three firings without worry of too much changing but, as was stated earlier, a lot depends on how hard you're working your brass... how hot it is, how much you're setting back the shoulder etc.
I have wonderful brass life ... only bump the shoulder ( no more than .002 and sometimes only .001 while FL sizing) I also bump the case above the belt with the innovative technologies collet die and, do the necks with a collet die also.
It's time consuming but, if all is well, I'm not moving the brass much at all. I really hate turning necks and deburring flash holes so, the longer I can use my brass, the happier I am.