Corn all over the midwest has been coming of in the 20's. I got 'lucky' so to speak and took mine off at 21, but I've seen RM's as high as 30. It has to be artificially dried down to 15 or lower for storage or it molds (why I want old crop not new crop for the stove). I don't own a corn dryer so I'm at the mercy of the co-op for dryer charges. You'll see much less corn being planted next season simply because the profit isn't there and the inputs are constantly climbing. The one bright spot is fuel cost but N is getting more costly every year and corn loves N.
Like I said previously, I want my corn below 15 for the stove. Besides, it stores better. Understand, test weright and RM are 2 different animals. Test weight is the measure of the meat of the kernel (what we are burning), while RM is the measure of the moisture content. I want my test weight (if I can get it that is), in the mid 50's and again, the RM below 15. Thats pretty much ideal and ideal is hard to get with the odd 'Global Warming' weather we had last season. Global raining is more like it.
Lots of corn around here with smut and vomitoxin. It's roastable but not marketable....I've burned some nasty, moldy corn before (from a grain bin cleanout) that looked awful but was dry and roasted just fine. Corn don't have to be golden to burn well, in fact, a darker kernel is usually a higher test weight than a light gold kernel.
Usually Equipment Trader Online has a number of small rotary seperator/dryers that seed corn ops use for sale used. Takes a small electric motor and is basically a mesh screen cylinder thats inclined. Gets all the chaff out and you could rig up a hot air burner blowing across it to dry corn as dry as you want to get it. Me, I'll take the co-op stuff.