Re: step by step - Accurizing a factory rifle
I am a cheapo bastich.
The first thing I'd do is
chamfer the crown to 45 degrees. This is the easiest way I know to ensure a good crown, which is usually a major part of newly acquired rifle accuracy problems.
Clean the hell out of the bore.
Remove and <span style="text-decoration: line-through">replace</span> remount the scope base(s) using blue (medium strength) Loc-Tite (or Permatex) thread locker under them, to secure/solidify the base mounting interface. Ensure the scope rings are securely mounted to the base(s) and scope. Learn about parallax and how to deal with it.
Try some good ammo in the rifle.
Maybe consider rebedding or at least skim coating the HS bedding block.
If this doesn't help, find the best shooter you know and see if the rifle gives them the same problem.
Only then, and not before, do you proceed on the basis of considering major work.
To fix a problem, first identify the problem.
Greg