This I shall investigate further and thanks for the tip ...So the only problem with tree stump remover is that it's really not regulated, so the amount of KNO3 that you get, and it's purity, let alone other fillers, is completely up to the manufacturer, as is the veracity of the label on the container.
So what some of us in the reenactment community do is to buy small amounts of much higher quality KNO3 from eBay, the stuff that's meant for making your own biodiesel. We switched because of past problems with the results, so now we get a much better product when making slow match with the better KNO3, and making slow match for artillery, for example.
Just a suggestion...., ymmv
Artillery may be The King of Battle, but only when the match stays lit and HOT !
And his Royal Britannic Majesty does not care for his artillery not firing, especially when facing wascally webels!
GOD SAVE THE KING
LD
Me thinks my first batch though burned well both free and in the chambers was weak.. I did find one "ring" of the paper bottom in one chambers
So next batch I will put in Potassium Nitrate until it won't absorb any more
Bear