I do corn, buckwheat, quinoa, wheat, oats, rye, beans....all that type of non-oily seed or grain in the Nutrimill. You can get anywhere from a coarse flour to fine pastry flour with the Nutrimill. I found it made a finer flour than the whisper/wonder mill. When grinding a new item I process a small amount and then check the resulting flour to make sure that it is dry enough not to clog the mill. On one occasion I needed to dry the corn for a longer amount.
I had a friend, not thinking, put flaxseed into her mill. She was able to unclog it by using popcorn, set the mill on the highest setting and tapped the side until it started moving through. Based on that and other recommendations for occasionally running corn through to "clean" the Nutrimill I used some dryer corn after putting through the insufficiently dried corn. No problems...
We have a Retzel handmill with both stone and stainless burrs and use the stainless for flax, sesame, peanuts, and such. I also use the Retzel for cracking grains such as cracked wheat or oats for breakfast cereals or for in artisan breads. Coarse corn meal for dusting pizza stones, and feeding baby chicks...