Followed a similar route but instead of turning east down the forest track to the road on the east side of Sheegowna, when I reached S309 317, the point where this track slaloms eastwards downhill via a track within fortified forest area, I instead continued southwards along the farm track that is roughly at about the 400m elevation.
I continued almost directly southwards, only deviating to sheep tracks where possible to avoid losing height. This left me at the forest. I had the option of turning south west uphill to regain the main track. However, rather than climb again, I entered the forest around S311 301 and tried to contour through the forest. This ultimately was possible, but at certain points I had to deviate from the track due to fallen trees. Eventually I emerged from the forest around S310 294.