Sounds like I'll need to do some youtube research on annealing. We'll see, plan to go shoot the old brass vs new brass and see what I get, but with as much variance as there is in seating pressure with the old brass, I have to think that has to create velocity variations. The best I could so far over 10 rounds was an ES of like 16 or 18, and an SD of around 5ish IIRC.