Re: make a long range hunting rifle
Put your rifle in a Bell & Carlson Medalist stock, skim bed it, put good glass on it (Nikon or Leupold at a minimum), do a good barrel break-in and start your load development.
After shooting it for awhile, you may wish to replace the trigger. Timney triggers are pretty good and not too expensive. There are other options, as well.
Having an aftermarket barrel installed is also an option, but I would not do so right away unless the rifle is shooting poorly and is not responding to handloading. You would be better off to spend your money on ammo while you build your long range skills. When the factory barrel becomes the limiting factor in your long range shooting, replace it.
When you finally do have the barrel replaced, have the face of the action squared, the bolt face squared, and the bolt lugs lapped (if needed).
You chose a very good rifle. Enjoy your shooting!