I separate mine by headstamps also. I think it does help but it may be psychological like Slamfire said.
I have enough 9mm brass to last the rest of my life also now. It's sorted and sealed in bags.
I shoot them until they split also, my problem is mine don't split. I dry them under an inferred heater and I think it is softening them back up a little every time I do it. Because my brass is sorted, I know which brass is mine when I get back from the range. The only split cases I find are someone else's cases that get mixed in with mine.
I used to find them all the time, until I moved to NC and started using the inferred heater to dry them.
I can't prove it but it sure leans that direction.
At any rate, now I don't pay attention to how many times they have been fired. If I want to load 1200 I pick a bag that has 1200 in it and use that headstamp.
I'm with the rest of the guys that load their favorite loads in larger volumes and shoot them till they are gone.
These jars hold about 1250 9mms.
View attachment 1153904 Each jar is one of my favorite loads, and they all shoot good in all my 9mms.
I sort them and bag them like this.
View attachment 1153905 So when I want to load they are sorted and ready to go.
View attachment 1153906 Here is some food for my Q5 Walther.
I shoot, deprime and clean, sort, bag, load and repeat.