I had some Cleanshot BP substitute that really degraded from year 1 to year 2.
I poured a line out in the garden and lit it. It just burned. Had an unopened bottle and poured it out the same way. I lit it and it was a little more exciting.No mushroom cloud though.
You likely need to have a main charge like I did (a singular pile), with a trail of powder acting like the fuse so you have some distance from it when it goes.
