Is the scope bore-sighted? After cleaning the rifle, as others have said, I suggest shooting initially at 50 yards to make sure you are on paper, then move out to 100 yards to fine tune your point of impact. ( Preferably from a steady rest). Once you are sighted in, then you can practice from field positions, prone, kneeling, sitting and standing. Keep practicing until you can reliably keep 3 shots on a pie plate at whatever range you are shooting at. I think it will take more than a couple of boxes of ammo to get there, even with legendary Tikka accuracy.
Hope you can find someone who is experienced to go with you, as that would be very helpful.
Hope you can find someone who is experienced to go with you, as that would be very helpful.