I have a friend, although I haven't talked to him in several years, who used to farm 80,000 acres in KS and east
CO. I wasn't on the trip, but some guys went out to shoot long range with him at his place. He had a house
trailer that he had all his reloading gear set up in, and he shot from there. Typical flat, nothing to see west
KS ag ground. The friends asked "What direction is safe to shoot?" Noting no berms or hills. His comment
was "Don't shoot the trailer." After a few quizzical looks (I am sure thinking, well, hell, I knew not to shoot the
trailer) he clarified. "You can't get a bullet off of my land no matter what you do. So the only harm you can do here
is shooting the trailer."
There you go Ian. Shoot a .30-06 in any direction at any time of day and night (except at the trailer!) and you
are OK.