In the past I tested this gray fuse with Methylene Blue and it reacts for perchlorate. I may even have pictures of it somewhere on the forums. I will...
Unfortunately it is more of that perchlorate fuse. It is also poorly fused. If these connections were done using traditional black powder quick match...
There was talk of "Gray Powder" who knows maybe be had a salute in the mix as a booster. Interesting is the wireless module was in the off position....