powder temperature variation effecting loads

[Ogre6br]

Hi
Has anyone experimented with differances in powder temperature and whether that makes any changes to your thrown loads??

I mean- put the powder in the cooler and throw your charges

then in the freezer to make it really cold but not frozen- then throw the charge with the same setting on the thrower

Then heat the powder with a hair dryer, be carefull how hot you make it) and then thrown charges all with the same setting on the powder thrower.

Has anyone tried this and if so what weight variations did you get with the thrown loads??


We have had days of weather in the high 90's low 100's,going to be over 105 today)
I keep my powder in a old cooler to try and keep it stable- but will the temperature change in powder as I'm loading change the charge weight of my thrown charges?/

thanks
later
P

 

[243jimb]

I have not personally experimented with this but I did read an excellent article by Rick Jamison on this very subject about three or four years ago. He made up a number of cartridges with different powders, put a third of them in an oven another third in a freezer. The remainder were kept at room temperature. With one exception the results were quite predictable. The "hot" ones increased in pressure/velocity and the "cold" ones decreased except for one Winchester powder that went up in pressure when it got colder! The Extreme range from Hodgdon was very consistent, hardly changing at all over all the temperature ranges. Hope that this helps.
Jim.