someone in the thread posted about departure at 2050 hours, so i clarified about the congested time slot of 8 pm.
I am a regular visitor to the Jammu since 2006, USK witnesses bulk of the rush due to its timings and punctuality, then Pooja Exp takes major chunk of demand.
So IR introduced this train to provide additional berths for travel till JAT. (between, special trains have nothing special about them, they are run to balance the rush that builds on regular trains)
Thanks a lot for those details...