Re: Temperature sensitivity of US869
It's going to be big. I have watched Varget, IMR-7828, RL-25, RL-22, Retumbo, H1000, H-380, IMR-4350 IMR-4831 plus other so called temp stable powders all at one time or another started chronographing in the morning on through the mid day heat and you can watch the velocities go up as the heat increases. In my 100 round boxes I carry for my long range 300Wby I am thinking of loading up 10 each for each temp range to keep my velocity as close to 3100 fps as possible. I use a custom BDC dial on my scope and it is imperative I keep my velocity constant. Back in the olden days I didn't shoot over 400 yards much and 100 fps one way or another didn't ever make any difference while shooting game.
Build a man a fire and you heat him for a day.
Set him on fire and you heat him for life.
Only accurate rifles are interesting.
Gordy and Brady.