Possum living, a you tuber, has a video showing him using a ball mill to mill a 65:35 ratio of potassium nitrate:table sugar and then using that mix he fires a small .44 bp boot pistol. I was considering making up a batch to use in my 1858 pietta brasser with some magnum caps, just for fun. If anyone has tried this I would like to know what kind of result you ended up with. Safety concerns, etc. It has a high ignition temp from what I can tell, That's why I said magnum caps.