I have a month off for Christmas and the ranchs i work on are thinking that they want need me so i have to kill a lot of time. So this looks like were i am going to be building my hunting loads for a my rifles. Were i live it is very cold during this time of year warm days may hit 32F. I need a good stable powder(s) to work up my loads for two rifles. Savage 11f 223 Savage 116 300wm Im not lookin for powders that will make it possible to drive tiny little groups, though it would be nice. What i am looking for is a powder(s) that will not be change to much from this Dec cold to when i go hunting during the spring and fall, when it can get up to 100F. I will be shooting 55g bullets out of the 223 and Nosler Partions and Accubounds out of the 300wm probably of the 180g class. Anything is apprciated.