Re: light weight .cheaper longrange rifle.
Why not buy something that is likely to be accurate right out of the box. Either a Savage or Tikka T3 lite. Maybe that Ruger is accurate but it's their low end model and none have a reputation for consistent accuracy. And even if you work on the Ruger it might not be that good. Only Ruger I might buy would be the African in 416 Ruger and accuracy it's top priority there.