Temperature and gunpowder!

[Paul5388]

The amount of sensitivity is going to depend on how much (like percentage) nitro glycerin the powder contains. The cooler nitro glycerin gets, the less sensitive it gets. So, you will probably find single based powders are affected less than double based powders.

With the forced split of DuPont and Hercules before WWI, DuPont took the single based powders and Hercules took the double based powders. To this day, DuPont (IMR) only has two double based powders (700X and 800X).

I would think the proper temperature to develope loads, to ensure there isn't a pressure problem, would be at higher temperatures. All the lower temperatures are going to do, if anything, is slow things down and lower pressures. It should be a pretty simple thing to zero the load in the cooler temperature ranges.