I have a 223 and 308 Encore, both 15" barrels. For the most part the 223 will be using 55 grain bullets and the 308 165 or 170 grain bullets. If you could choose one multi purpose powder to work up loads, what would it be and why?? I'm looking to find the best powder so I would have to spend $ on buying 2 types. Is this realistic or just wishfull thinking ??