Inconsistant C.O.L.'s
RCBS press, steel dies, pretty standard stuff. Reloading .308, 25-06 mostly. I've noticed for a while now that when all other things are identical (bullet, brass trim length, loads, seating depth, etc) my cartridges come out of the press at slightly different C.O.L.'s. Varies as much as .005 - .008". Kind of frustrating when you go to so much trouble to make each round exactly the same to maximize accuracy.
Any idea what I might be doing wrong? I occasionally clean dies with brake cleaner and a brush.