Originally Posted by
Turnup
Black Powder does not detonate under any normally achievable conditions. By definition, "detonation" is a reaction which proceeds through the explosive at a speed greater than the speed of sound in the explosive. This speed in solids is far higher than the speed of sound in air. A deflagration (= combustion) velocity of 950 fps is considerably less than the speed of sound in BP and nowhere even approaching instantaneous.
The deflagration rate of BP is less sensitive to pressure than is nitro powder, so pressure curves are flatter and this is why it is so much more forgiving.
That said, I would not feel much comfort in putting holes in a container in an attempt to lessen the explosion and it seems that in opting for a prohibition the MLAIC feel the same.