what @ebf said - get a torque driver and make sure the action screws are set correctly. From memory in Tikka plastic stock no more than 35 in-lbs ? Very important to not over tighten, cos you'll crush the stock and the floating recoil lug set up will be screwed permanently. Also use the torque driver to check all you screws, base screws on rings and the ring screws holding the scope.
And in terms of trigger technique, practice dry firing plenty before you put lead down range. By watching the target thru the scope as you dry fire you'll see if your technique is creating any push or pull issues.
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