Max temperature for storing powder?

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d625

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What is considered to be the maximum room temperature where smokeless gun powder is stored? Assume the summer temperature swing is 50 to 100 degrees F and the powder is in the original factory plastic containers.

One reloader has suggested storage of 1 lb containers in an old refrig set to approx 40-50 degrees F. Others have suggested that there is no real maximum temperature in the context of storage in the typical workshop or garage.

Any opinions or real time experience?
 
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Reloading powders like the same temps that you do........ An occasional trip to 90/95 degs. isn't going to hurt it. Just don't over do the high temps. There is no reason to store opened reloading powders at low temps. Just remember to reseal the container so to not allow the powder to absorb humidity. ........ Big Cholla
 
I would be nervous storing powder in a fridge. What happens to your glasses when you go outside after being in AC?

Cool & dry is what's recommended.

My garage gets 100+ most days in the summer so my powder lives in the bedroom in an old cabinet. Not sure if the wife even knows it's there...:rolleyes:
 
SAAMI has a book on the subject that you can get and read.
Readers Digest version is that if you can survive the heat, so can the powder. Humidity is more of an issue, as powder does not like to go swimming! ;)
 
Along the same lines............

I live in the humid South!
The top was off my powder dispenser for a few days so I am pretty sure that powder has gotten moisture in it.
How do you dispose of it safely?
 
WFR: Spread the un-wanted smokeless powder around your lawn or garden thinly and evenly. It makes good fertilizer. Water it with a sprinkler a little. ... Big Cholla
 
Makes excellent garden fertilizer, if a bit pricey.
If all that happened was that it sat open a few days, I'd put a dessicant pack in it and use it later.
 
Last edited:
I am using powder and primers that spent 30+ years in a south Texas garage, subject to 100+ temps and humidity. It performs fine, haven't had any problems. Keep them in some sort of cabinet, and they will be protected from fast temperature swings and condensation.
 
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