If you picked up a bedded, tuned, Rem from "HWSNBN", get some glass on the darn rifle and shoot it! The rifle, after being tuned, is more than capable. Don't worry about the other crap. All you need is your rifle, some cleaning supplies, and a good bore guide. Once you've purchased your scope, spend money on the following, gas for trips to range, ammo to shoot at range, membership to local shooting club (if there is one) where you can gain experience from others who are willing to share, and if budget allows get reloading equipment. If your military, which I think you've indicated in the past, try and find someone you work with who is a very experienced long range shooter and learn about trigger contol, breathing, cheek weld, scope picture, and how to get yourself solid and stable in various tactical shooting positions. Practice this lots!! Dryfire lots, (thats a very cheap way to practice trigger control). This also worked well for me, get into prone position, close your eyes, put yourself on the rifle in your shooting position, the open your dominant eye and look through scope. Keep practicing this until your cheek weld is the same every time. You should get to the point where every time you look throught the scope the picture is the same.
You got yourself a good rig, get out and put some miles onto that baby!
Good luck!