A good barrel is a start, check to ensure it's not bent, check the rifling at the start of the leads for lifting of chrome, damage to lands, charring at the throat.
Remove the flash eliminator and check for muzzle erosion, repair as required.
Ensure that rear action lockup is firm with no twist to both parts allowed, ensure there is sufficient clearance on lock lever to allow for settling in.
If possible, locate and fit early triangular wood handgrips.... rifle sits in open palm better than round laminates and doesn't heat up as much.
Set your sling up as single point with no weight on front swivel.
If possible, weigh out and batch your ammunition, use heavier weights for deliberate and lighter for rapids and snaps, use mixed for rundowns.
Ensure rifle will operate on low gas setting - 3 or 4, repair and keep clean.
PRACTICE, PRACTICE, PRACTICE.