I'm just thinking - the powder rides an unheated truck to the warehouse/distribution. Purchased and rides another to be delivered at home. Loaded, sits in the rifle during all kinds of weather. I get that temp, at that point, affects performance but does temp affect the potential performance prior to getting ignited at shot time?
Not poking - just thinking out loud. I'm probably not super concerned about temp control at home.
The subfreezing temps of winter do not concern me nearly as much as the 100 degree plus days of summer. Some of this stuff has already been in my possession for ten years. Some of the powder stored here is still in square paper cans from Hogdons. 1970s? Earlier?
Who knows how much longer the components will be in my possession or my heir's?
It is believed that long term exposure to heat will degrade the performance of smokeless powder or ammunition.
