cold weather

[nat175f2]

Is there a chance of moisture building up inside of rounds due to condensation from being in the cold for hours and then inside for hours. I have to keep my gun in the car at work and when I get home I take it inside. Are the rounds going to be reliable?

[knight0334]

Minor if any. If there as already a high content of humidity in the small amount of air within a cartridge the powder itself would have absorbed it already. Gun powders are highly susceptible to water absorption.

The cartridges are close to airtight, so they dont allow much if any fresh air in to bring more humidity in. Heeled cartridges like 22, 25, 32, 38, 41, 44, 56 rimfires and the old 38 Colt are a little more susceptible of allowing moisture into a closed cartridge.