The next time I am able to freely and without fear of arrest light of some powder, I will video the tests. I love to do this. However, in the last two years it seems that half of our state burned down. 2017 our county had over 6000 homes burned and this year the fires in the north basically destroyed the entire city of Paradise. Almost every place I used to be able to hunt, shoot, and make loud noises now looks like the surface of the moon, if the moon was covered with burned stuff and ash. As a result folks are a wee bit sensitive when they hear explosions and see smoke. So it might take a while, and by a while I mean months. Since this will be just another repeat of things that we have already done, I have to say that lighting a pound of powder just poured into a pile is a beautiful thing. From a safe distance there is a blindingly bright light followed by a muffled "whoomp" sound and an incredible perfect mushroom cloud going up and out. In a jar like the one i the video, light, very deep loud crack sound followed by a narrower mushroom cloud with smoke rings and plastic shrapnel. I will say that we have always lit anything we put a fuse into from the bottom. The weight of the powder and the sides of the jar including the restricted neck make for more pressure than you would think. Not nearly what it would be if there was a lid on the jar.
So when I can I will take videos of our "experiments" , but be patient. And Joe, with what I paid for my materials, it costs me about $2.25 a pound to make. (I have to keep the cost down since it takes 3 ounces per shot in my cannon.) When I can I am more than happy to burn it up. As long as I get lots of noise and smoke.