Originally Posted by rockquarry

Regarding 9mm brass...once-fired stuff with the same headstamp is very cheap and it eliminates the need to worry about the effects of case variations. You put yourself at a disadvantage from the start by using range pickup brass unless it's all the same.

I've been using some Winchester 9mm once-fired cases that I've had more than twenty-five years; been reloaded many times and still works fine.