212man - that's a good find and confirms the idea that reducing the Nr on the 130 is about reducing both MR and TR noise - everyday's a schoolday
The 365 N3 also has Nr rescheduling from 355 at SL to 360 at 5000' but that, and the 365 switch (guess what Nr that gives) is to help reduce Nr decay in the event of a SEF at a critical stage of flight rather than noise reduction (which you wouldn't get by increasing Nr according to that linked paper).