Nice qrp qso, for watts per mile yours is up there with the best of the best.
When the flux is high, qrp is fun,
I have had many notable qrp contacts since 1975 but by far my favorite of them all was a 4 way qrp qso back in 2013 with JL1TZQ near Tokyo (SK 2021, RIP Toji), BV2DQ in Taiwan, ZL2OK in New Zealand and RA0FF in Russia all on 29.6MHz FM with only my Motorola 6 watt MT1000 Handheld with
the stock 11.5 inch rubber duck and nothing else.
As I said when the solar flux is high and the A and K are low then even 10 meters can be a blast.