I reload. I like to buy most of my powders in 5lb containers to save money. It is amazing how many people get completely freaked out when they see a few 5 pound containers of powder sitting around.
Storing gasoline inside is much more dangerous because the vapors are heavier than air under most conditions and can travel to an ignition source and the flames can travel back to the container. Propane vapor is also heavier than air and has a very wide flammability range, so it is also more dangerous to store inside. Propane containers BLEVE when they are inside a burning building.
During my career I went to several fires where propane tanks from barbecues exploded while we were fighting a house fire. Each time we were very thankful that we were far enough away that no one got hurt.
fireman15
I’m also a firefighter (volunteer with lots of paper) and I handload also. My experience is the same as yours. Of course I store my smokeless powders as per NFPA guidelines and I keep it in our detached garage and sheds, not in the house.
I have had people in gun stores freak out when I’m buying 8 pound kegs questioning why would need 8 pounds and expressing gladness that they are not my neighbor in the event of explosion. Of course they don’t warn the owners of the LGS of the dangers of having 100s of pounds of powder sitting right there on the shelf waiting for the hapless consumer to place in their shopping cart.