PTP SXTsq-5-ac excelent status but terrible throughput

I changed TCP-syncookies and TDMA period size just to see, but nothing changed…

In lab we have two SXT G-2HnD r2 so I tried to create a new ptp on 2.4GHz using same parameters, with slightly better performance ~140Mbps with a distance af 7-8m… but considering the max datarate of 300 Mbit/s, seems to be a nice value.

Does anyone have ever used a ptp to transfer files between remote sites or similar?