Safe storage temps for reloading equipment

[dscoduc]

tl/dr:

Can anyone help me with information on what is considered safe storage temperatures for smokeless powder and primers?

Long story:

I have an un-insulated shed where I do reloading and whatnot and would like to store my reloading equipment out there but am concerned about the morning cold (low of approx 30 degrees) and mid day temps (high of approx 110 degrees).

[JackEllis]

Those temps aren't extreme but if you're really worried and depending on how much you have, store them in a box full styrofoam packing pellets or something similar. That'll protect the powder from the extremes.

[dscoduc]

Those temps aren't extreme but if you're really worried and depending on how much you have, store them in a box full styrofoam packing pellets or something similar. That'll protect the powder from the extremes.

Would an ice chest cooler work for maintaining a constant temperature?

[JackEllis]

Would an ice chest cooler work for maintaining a constant temperature?

No reason why not. I was trying to think of something cheap and readily available but even a cheap cooler would work. Having some extra "thermal mass" inside would help even out the temp swings and that could be just about anything - containers of water, motor oil, packing peanuts...

[sofbak]

If you want some storage a little more secure, better insulated, and potentially lockable-look for a cheap "dorm room" refrigerator (running or not). Used on-line, they can be had for $25-40, new from about $50. Add a hasp and lock if security is a concern.

Plenty of insulation value for powder storage.

[17+1]

I keep my powder and primers in the house. I leave projectiles and everything else in the poorly insulated single car garage where my reloading bench is.

I eventually plan to build a tuff shed work shop when I move, with 3D printer, mill, lathe, reloading bench, work bench, etc. will probably run AC and a small heater in there to control the temps.

[Bigtwin]

I have always left it in the garage without issue. Some of my primers and powders are 10 years old and I get 110 Degree Days as well as below freezing days where I live. I just keep it in the original container.

[the86d]

Those temps aren't extreme but if you're really worried and depending on how much you have, store them in a box full styrofoam packing pellets or something similar. That'll protect the powder from the extremes.

I wouldn't use Styrofoam, as the static is a concern...?

[GW]

I wouldn't use Styrofoam, as the static is a concern...?

That and its a PITA to work with.

I haven't had any issues with my uninsulated shed and the primers and powder stored there are still good.
I am assuming that the OP's temp range 30 to 110 is not in the same day but over the course of the year.

[Fizz]

Would an ice chest cooler work for maintaining a constant temperature?

Powder/explosives (primer) and enclosed boxes generally do not mix. Powder is only really flammable until it's pressurized.