I have a Sako 75, which is basically like your Tikka. Drop down to the 200 ELD-X with 62.8gr of RL 17 at a COAL of 2.855". Groups 0.5 moa at 2950 fps (verified with my magnetto speed). I generally hunt elk and mule deer with a 180gr Accubond or Partition. They both are almost 0.25 moa (one ragged hole) with velocities of 3056 fps (65.5gr HV100 at 2.86" OAL). If they didn't drop in their tracks, they didn't go more than 25 yards before flopping over. Ranges have varied from 50-425 yards on game.