You could contact Western Powders and ask them for loading data. My guess is that they will tell you that 2230-C is too fast burning to be used in a case the size of the .270 WSM. That cartridge needs a much slower burning powder. Perhaps the best option would be to find someone willing to trade a slower powder for your 2230-C. Seems like there would be someone out there desperate for a .223/5.56 appropriate powder. If you found someone with some Accurate Data 86 Extruded (sold around the same time as 2230-C) you could be in business.
NRA Endowment Member