Wow... All these recommendations and no one's asked what around here would be a pretty important question.... How accurate is the gun currently? What kind of accuracy are you getting from it? If you are .5 moa... I wouldn't mess with a thing! Now... If you haven't tried various ammo, before doing anything else... I would try shooting various makes and or bullet weights to see if there's something your rifle likes that shoots good groups. If you reload... Same thing...except seating depth, bullet type, primers, etc.
If you've done this... And are getting .75 to 1 moa... I would look at improving the trigger. 1 moa or up... I would be looking at the stock (bedding or replacement). 2 moa or more... Time to cry.
All this assumes that you shoot .5 or less with an accurate rifle with good ammo.
If not, spend your money on ammo and practice more.
Just what I'd do... :)