I have recently received a 1983 Magic Mill III. I read through the owner's manual and accompanying documentation and it says that moisture or oil can gum up the mill but does not mention drying your grain anywhere.
In general (bonus points for answers specific to my Magic Mill), do I need to dry my grain before milling? Like by leaving it in the oven on low heat for a while beforehand? I milled some pumpernickel flour last night without drying the rye berries and the flour bucket felt a little hot and there was some flour stuck to the millstone outlet area.