My powder is Goex. Good ignition, accuracy is consistant, and the price is right. (I buy in bulk) As far as clean up, All powders leave a residue, and I like to give my ML's a water bath before putting away. I am very fussy about cleaning, and if I have to take a little extra time to disassemble my ML to do this, it's worth it to me. Actually I enjoy it. All powders are corrosive, some more than others, so clean up afterwards is a must, no matter what powder. In the past I have tried Pyrodex, APP, Pinnacle, Clearshot, and 777. I have not used BH209.