I have been on 38lsb and making a bunch of contacts!! Conditions are good right now for me going north up the east coast of the US.
San Jose CA to Adelaide Australia (that is on Australia's southwest Coast - BTW) via longpath on 27.385mhz/LSB (~13k+ miles) with a 4 element Yagi beam and barefoot CB radio. Yes; it can be done . . .
"Ground wave" doesn't occur much above 3 MHz. And if you aren't using a vertically-polarized antenna you won't be experiencing much "ground wave".I think you mean that Tropospheric Ducting does not occur at HF.
Hey Robb - Adelaide is quite a way from Oz's "southwest coast". About 1500 miles. You want the southwest coast of Australia, that would be Perth.