Powder is not more dangerous than loaded ammo. The factory container is designed to split open before any pressure builds up. Thus the powder burns without exploding. Hatcher did experiments on fairly large volumes of powder 60 or 70 years ago and never had an explosion.
While primers might be loud, in the factory packaging they should be pretty safe from mass explosion.
Hope I'm not pissing in your pickles but is very possible for propellant to burn to detonation and I have seen it on 2 occassions during the last 25 years. We are currently sitting on 6,000 lbs of tank propellant that we can't get rid of because of the danger of a high order detonation. If primers are safe from detonation, ask Federal why they have the only primers that are packed in thick packaging? Something about being sued if I remember correctly.
In the good old days when the CF wasn't as enviornmentally sensitive as it now is, we used to burn SAA that was designated as unsafe for future use in a specially designed furnace built for burning SAA. And yes like many Ammunition technicians, I tried to take a long job and shorten it up, by adding additional SAA above the limit until one day in CFB Borden I blew up the furnace made of cold rolled steel, if I remember correctly.
The film is old, and not very scientific. It proves nothing. It should be remade properly with witness panels at 10, 25 and 50 meters at a minimum. SandRoad, if you can remember the name of the movie, I would really be interested in finding out so I can order it through work.
NRC, when it was trying to amend the explosive regulations received very many insulting letters that achieved nothing. I'm amazed that they remained polite. I sent my letter, that lead to 6 other follow up emails, with the signature block as an Explosive Technician from a gov't organization and was treated very well until I started asking all the correct questions. By this time they decided to suspend the amendment.
And somehow when your office is surrounded by multiple tons of explosives or whatever, the fire fighters won't respond either. They told me that they would stop for coffee on the way