The subject of grinding black powder to a finer granulation comes up often on this forum. Well, in the 1970's, for a while there was a serious shortage of black powder. Interest in grinding down coarse grades into something more suitable was high. An
ml dealer in Miamitown, Ohio made these grinders to meet the demand. This little gadget does grind bp very efficiently. But, it does not give a finer granulation. e.g. 2Fg down to 3Fg. It will grind and give you bp dust. Made of wood it grinds safely. It you do not want to use it you can put in your wife's curio cabinet and look at it as a..........uh......curiosity. Hard to put a value on it so I'll sell cheap, $15.00 shipped and most of that is in the shipping. I sell and ship only to the U.S. I accept personal checks.