Absolutely. In fact the bomber got lucky to do that much damage in that container. I don't know but I bet the container survived in-tact.
Your not argumenative at all. In fact yours is a good question.
I am by far no expert on this subject. I have just watched too many kids play around with powder and rockets and the white smoke plume that I saw was similar. Even when I threw grenades in the Army the smoke was grey. When the big guns did their thing the smoke was black.
White is sissy smoke.
It depends on how you pack the charge. The smoke from a muzzleloader with a bullet is gray, the smoke from a blank charge is fairly white. Since it doesn’t build up full pressure, the combustion isn’t complete. The last place I remember that a person could buy black powder in that area was a gun store in North Haledon, New Jersey, but I’m sure there’s someone on Long Island that sells it, too.