well, that depends on several factors. How wet is the milo? Yield? How much of the plant are u taking in? Certain varieties thrash harder as well. The book settings are a joke. My current settings in 130 bu 16% milo are 17 concave, 1050 fan, 800 cyl speed, 15 chaffer 8 sieve. using large wires in the front 2 and a round bar on the last one.