I can think of something like this...
AW139 with 4500kg EW
1450kg fuel (due to MTOW 6450kg, this summer 6800?)
cruise 5000' 6ºC Tas 152 (no wind)
back to base at 1000' 16ºC Tas 138 (no wind)
RoA with 30 minutes on station and 30' reserve = +-203Nm
Or like the other day...
80Nm to the search area and 2 hours at 60-70knots (short hover while boat pickup the dead body
) and lading with just 20' of reserve.
But more than 200nm...
Regards
Aser