I segregate all of mine by headstamp, but I'll also admit that I really don't think it does anything except feed my OCD a little more. Of course I do a lot of contradictory things in my reloading habits. I sort by headstamp, refuse to weight-sort anything; I have to trim revolver & rifle brass, but trimming pistol brass is a waste of time. I'm not trying to say that one way is better than the other, it comes down to how anal do you want to be? If you've got the time & it makes you feel better, then go for it .

-Klaus