Dave Oldridge wrote:
You will not get a consistent path on 10m of 300 miles without some
pretty expensive antenna hardware and high power. Just cannot be done.

How about moon bounce? :-)

You'd actually get off cheaper trying to do it on 2m SSB (which would
probably work OK if you stacked two yagis one over the other and fed them
with a good amp).

Which reminds me of something that nobody seems to
have mentioned. If a QSO is the only goal, satellite
communications should work well if not too crowded.
--
73, Cecil http://www.w5dxp.com