Well, just completed scanning all 489 systems in Barnard's Loop Sector, no sign of the Medium sec system - must be somewhere nearby. Only possible candidate I came across was the locked HD 294518 system, but pretty sure that's in Col 70, so not exciting. Only actively searched for systems named after Barnard's Loop, so I may have missed some, but my galaxy map has a nice black hole now when I filter on unvisited systems
I've been uploading into EDSM, and should have some nice explorer scans, so all good. Hopefully Davanix will post the location so we can confirm the dead-end - though why FD would lock a system they've just talked about is a mystery.
o7