Re: Powder Temperature Sensitivity
It would be hard to develop a chart since so many variables go into the sensitivity of ANY powder. Things like case capacity, load density, bullet weight and cunstruction over the charge, twist rate in relation to the bullet used, free bore, and of course what spread of temperature youre shooting in.
You will use some powders that are not famous for insensitivity and you might find that in your circumstances the difference with 80 degrees of swing is minimal when another shooter with other circumstances finds a HUGE increase or decrease in velocity. You cannot accuratly predict temperature sensitivity and IMHO too many shooters place too much importance on this. Find a good load, learn how much it increaces and decreaces in a given temp spread and BE HAPPY! None of us should be pushing a load to the max where a few degrees sends the load over the line.
Just my .02 cents
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.