Official clearance upto 130kmph between HWH and BWN is probably still not given.
But unofficially it has been captured to have hit 120-125kmph in HBC(Check youtube Videos of Kolkata railfanns) . Rest from BWN - MLDT is max 90-100kmph while after MLDT till NJP, it hits 110- 120kmph.
Note- Howrah Bardhaman Chord(HBC)