Shoot it, clean it, polish it, look at it, carry it around the house like a new baby.....shoot it some more and put it away clean.
Then....trigger job (will help), try upward barrel pressure near the end of the stock
(might help, or make it worse, worth a try), try several different style and types of factory ammo or handloads and keep records of the targets. Other than dual pillar bedding and/or glass bedding it and/or floating the barrel there' s not much else to consider.