My Tikka has 2 action screws and a third screw towards the front of the stock. Does anyone know what that third screw is for and what it should torque.
Ha! They should've called the "Roughneck", that would've been better.
Like @OdinIII said, that's just a threaded whole for accessories (e.g., extra sling stud, forend rail, etc.). No need to torque that screw, it's just filling an empty whole at this point. Here's a view from the back.