Working with a variety of mounts and scopes, my experience is it makes little difference if you are using Wolf or milsurp ammo - the groups stay large.
The AMMO - that's where your greatest gains in accuracy will come from. Use good commercial or handloaded ammo.
Make sure the barreled action is tight in the stock too - the issued configuration allows too much vertical wobble. I use a bit of filler - cork or plastic - in the barrel channel. Some synthetic stocks don't have the recoil lug either - in time the action will begin to wobble as it 'wallows' out the inletting. So, a new stock is a good basis, but it does require more work for true performance.