I currently have a factory stock 111 in .308 and was looking into getting a Shilen barrel in either Varmint or Bull contour for it at the same time as I order a new stock (probably McMillan since its a lefty and not many people make stocks setup for that). My question is, as long as I'm doing my part and shooting the good stuff, how much of a difference would I see out of this change? Right now I can get right around 1.2 MOA on a nice day out of my rifle.