Hello!
Is there a good general equation that relates powder temperature to chamber pressure and muzzle velocity? I know there are very specific ones for large artillary, tank and battleship guns but do not recall having seen even a general one for nitro powders used in shotguns.
I can imagine there might be differences in such equations for single base, double base, etc. powders, maybe even for powders of quite different burn rate or retardant coatings. Such equations would seem nice things to have when working up low chamber pressure loads for summer use and would like to know how well this load might perform in fall and winter. Presently some of us add a grain or two or even three to our low pressure summer loads for shooting in icy temperatures.
Thanks,
Niklas
