Back in the 70's I bought Potassium Chlorate from the drug store to make my own compound for percussion caps, as none of the stores in Smithers could access percussion caps. The formula I used was used in various tube and pill locks in the 1870's through to 1900.
I found it to be very explosive (strong) but also very corrosive.
These chemicals are no longer available to the public, I assume, but haven't tried to duplicate those experiments from almost 50 years ago.