Reloading/powder was my first thought too just seeing the headline. The burns to the hands and face are certainly suggestive: whatever did the burning was something she was handling and interested in.
Whatever happened, there was almost certainly some degree of negligence involved. I just hope it wasn’t so bad as checking how much 4985 is left in the jug by using a match as a light source...
They'll spin it as bomb making gone wrong in 3 ... 2 ... 1 ...