Ok... it's good that you are checking out the possible problem areas.
The point I was making was that unlike other action types, the Tikka actually relies on compression of the 2 piece recoil system to stabilize the recoil lug.
On the other hand, pillars limit compression of the stock so that screw tension is stabilized, but considering that the area that you have bedded is not a recoil area in the Tikka system, limiting compression there will actually relieve pressure on the recoil lug.
The fundamental basis of action bedding is that the only important area of a stock to bed IS the recoil lug area, so in a sense, you have done the reverse.
While there is no guarantee that the bedding is causing your accuracy issues at this point, it is one likely suspect.
I'd bed the entire action, but overall, it would be a better strategy to bed the lug and and relieve the bedding under the screws to allow the action to float there so that the primary compression force is returned to the recoil lug itself.
TC
