i have a standard Winchester model 70 chambered in 7mm rem mag. I intend on completely rebuilding this rifle, going to get new barrel , new stock, and maybe even a completely new Montana rifle co. Action. But where do I start? First thing I’m buying is a vortex viper pst gen 2 scope. But I don’t know if I need to buy a single point cut rifled barrel next? Or do I get the stock next? I seen some McMillan stocks only have stocks made for certain barrel contours. Therefore I don’t know what should be my next purchase... any help would be great!