Currently RPM P7 locos are used with MAS bound trains only. RPM P7 comes as permanent link to SBC bound Shatabdis, DD, Bridavan etc. As offlink you can spot them with CBE or TVC bound trains also. There are always good chances of getting P7 as loco links for any SF train originating from MAS.
I think P-7 has never reached MS ever. If there are plans of new P7s to introduced, it may get allocated to MS.
Before that MDU, TPJ crew have to be trained with this advanced Loco...