what are powder and primer tolerances for heat/cold?

[khclark]

I'd like to move the bulk of my powder and primers out of the house and into the shed for safety/fire hazard reasons. The shed is quite dry but not "conditioned" - it gets hot in the summer and freakin' cold in the winter. Anybody know if unopened powder containers and primers would be harmed by being exposed to temps from -15F to +100F? Thanks.

 

[khclark]

I'd like to move the bulk of my powder and primers out of the house and into the shed for safety/fire hazard reasons. The shed is quite dry but not "conditioned" - it gets hot in the summer and freakin' cold in the winter. Anybody know if unopened powder containers and primers would be harmed by being exposed to temps from -15F to +100F? Thanks.

 

[H Richard]

The heat more-so than the cold will give you accelerated deterioration of powder, and I would expect also primers. You are much better off to store in the basement.

 

[Paul5388]

I don't know that there is more fire hazard to powder and primers than there is with good rich heart pine boards in your house's frame.

I have 1970s powder and primers that were stored in 100+ heat and it hasn't hurt either one.

 

[OKFC05]

SAAMI has standards for storage of powder and primers, which you can obtain from them.

Your stated temp range is not a problem, but humidity in MA may be. Temp changes can cause condensation unless measures are taken to prevent it.

 

[khclark]

Thank you!

 

[John R]

If your going to store your powder in the extreme cold, bring it in the night before your going to use it and let it warm to room temp.
If the powder is cold and you open it in a warm room, it will attract moisture.
Also be careful of the plastic containers, there very brittle when cold.