When you do brass do them in 100 round lots, don't do 10 piece here 20 pieces there, and so on, do the same thing to all the brass, and do them all at the same time. Most of what I have to say goes back to this rule of thumb.
Patrick, what is your exact process with brass, sorting, wieght, etc.?

Also, with Winchester brass, uniforming the primer pocket, what exactly is your process?