Thread: How "cool" is cool for gunpowder storage.

AS it is illegal for gunpowder in bulk, i.e not in cartridges, to be stored inside a "house", we have to find alternative storage and for most it will be a free standing garage or outbuilding.

The containers state a requirement for "Dry" (no problem in most cases) and cool storage.

I am cognisant of the fact that many garages (mine included) warm up quite considerably during the day and wonder what the actual temperature is when cool changes to warm as well as what the safety limit is for gunpowder, including Black Powder .

Anybody aware of a specific temperature as opposed to the weasel Lawyer words "Cool"?