The mil. loading drill does not allow for blowing, or dumping unfired powder on the ground
Actually, the proper drill does not, BUT a silly procedure has cropped up in Rev War reenactment that I believe is the reason for the recent burst barrel, which occurred last year.
The proper drill is that after firing in volley, the musket is lowered to the position of the beginning of the loading sequence. Now..., you are supposed to look
down to veryify smoke coming back through the touch hole to veryify the thing went off (especially if you have doubts).
IF your musket did not flash the pan, so all you had was a "clatch", you are supposed to half-cock your firelock, dump the prime, prick the vent hole, draw a new cartridge, prime the pan, close the frizzen, dump the remainder of the cartridge onto the ground, and be ready to follow the next set of firing commands.
IF your musket did flash, but you don't think she went off, you do the same thing.
In both cases you should feel the powder crunch when you prick the vent hole.
BUT, somewhere somebody introduced dumping of the main charge, and simply "reloading" the flintlock. Which is, quite frankly, stupid, as it does nothing to address the failure to fire. If there was no flash, either the prime is damp or you need to knap the flint. If there was a flash, then you need to prick the vent hole to open it and to feel the powder. IF you prick the vent hole and replace the prime (regardless of the problem) you are eliminating the two most common problems, and you are verifying the thing is loaded. Reprime and attempt to fire. IF you get two "clatch" in a row, knapp your flint, ensure the jaw scew is tight, then follow the above procedure.
If you don't feel the powder, it probably went off, and you were wrong. What the dumping does, especially in humid weather, is coats the barrel with unfired powder..., and if this gets above the breech area, and in sufficient quantity..., you WILL bulge or blow your barrel. I have seen some reenactors load, misfire, and dump as many as three times before they attempt to clear their piece.
You don't "dump" your load unless there is a final cease fire, and you are going to be marched back to camp for cleaning, OR you are leaving the field for the rest of the action.
LD