How about 50 lbs of gunpowder stored in the same room as the T bottle of O2? Is that frowned on? Asking for a friend.
Actually won't make any difference, gunpowder is an accelerant with enough O2 already in it. With extra O2 it shouldn't burn any different.
Gunpowder doesn't explode, unless in a container where it can build up pressure while burning. 50 or 100psi doesn't cut it.
Black powder, on the other hand, is a low grade explosive.
Around larger quantities of either one, I'd try to avoid sparks and have good grounding on anything I touch. A synthetic rug that creates a static charge probably isn't a good idea.
40 years ago back when I was reloading a lot, I smoked while operating my RL450s with case feeders mounted. 452AA and ww-571, were the powders that I used for pistol, for rifle I liked IMR powders since they burned so much cleaner than ball powders.
Now I no longer reload, or smoke.
Michael