Ist look down the bore. does it look well polished, do cleaning patches go down the bore with no rough spots?

Is the trigger light enough for you to shoot good groups?

Is it in walnut stock? If so take the rifle apart and make sure that the area in the stock around the recoil lug is smooth and that the rifle doesn't bind when you put in the stock.

Torgue the screws to the following numbers in inch/pounds

Diagonal screw: 35 min, 90 max.
Trigger guard screws: 30 min, 50 max

If that doesn't work I would consider an bedding job with a free float on the barrel