For the S-200VE Vega (SA-5B) RPC with 0.7deg, MHI mode (!!!) SAMSIM calculates with the following detection ranges if the target P=0:

F-117A real - 50km
F-117A simulated at Ashuluk - 100km
B-2A - 40km
MiG-21MF - 300km

PS: Please do not ask sources, its my educated guess only.
(Estimated target RCS is based on verbal accounts of those, who were operating real radars against real targets)