Reloading question (power stability)

[Dcrafton]

When we speak about powder temperature stability,
Are we talking about the ambient temperature or the powder temperature.
If I keep the bullets in my pocket on a cold day will I be able to maintain more stability or is it strictly the ambient temperature in which you are shooting in?


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[rayporter]

we frequently keep ammo in a cooler on hot days or in a cooler with a warm bottle on cold days.

I have even had an ice bottle in it on hot days. so yes it helps, but a cold chamber will sink that cold into a cartridge real quick. just like cooking a cartridge in a hot chamber, you only have so many seconds to shoot or the cartridge will get hot.

when on the line I keep my ammo out of the sun as much as possible.

now even with that the rifle can go out of tune from temps and atmospherics real quick.

 

[cornfed]

It's referring to the temp of the powder. Keeping rds in your pocket on a cold day would probably benefit you if you developed your load on a hot day. I try to use Hodgdon's extreme line of powders as they're more forgiving.

 

[PA Hunter]

I do my load testing around the same temp I hunt in. I was just out today with two new powders and loads 28 degrees. I even let my rifle and shells sit for some time to acclimate to outside air temp. I also pay attention to my cold bore first shot not fouling shot.