What many fail to realize is a rifle shoots best at certain velocities or "barrel nodes". So the best thing to do with temp sensitive powder is find a node and add or take away from the charge according to the temps you'll be shooting in.
For instance when I used to use R-17 I had 3 loads, summer, spring/fall and winter. Your only talking about .4 grains difference from the heat of summer to the cold of winter for a medium capacity case but the velocity was the same and in the node. Kind of a PITA but it works and solves the problem.