I use a 99.8% pure KCLO3 for my BP. The problem now is I'm in Tennessee where I used to be in New Mexico. Anyway, My KCLO3 came pearlized. I decided to mill it in my ball mill. I ran this for some 30 hours. It came out feeling like moist sand. So I milled it for another 20 hours. It still felt damp. I make a really nice charcoal out of Willow. I screen this as it's for my cannons. I have pucked and ground it for my flint locks. The speed of this new stuff was awful. I had suspected this and only made a few pounds. Then I took the rest of the oxidizer and spread it out in a thin sheet on a table in my gun vault. There I have a dehumidifier. I set it on continuous and left it for a few days. The stuff went from 19% to 5%. I still have yet to batch some of it but I think I found my problem. Anyone else get moist oxidizer from a high humidity climate? If so, how do you store your ingredients?