I think these are really neat. I remember years ago, one of the very first nest cams was from the top of the Kodak building in Rochester NY, it was a peregrine falcon nest. Did a quick google search and I see they're still offering the cams! http://www.rfalconcam.com/
Those nest cams are pretty neat, In portland one of our local news stations has one on a hawks nest. At first you would see the birds every once in awhile, then an egg and then another soon there was 4 now they have hatched. its a pretty cool thing. if you wanna see it its at www.kgw.com they put it up every year.
Others have offered up a sighting of roughly 2 inches high at 100 yards as a good sighting scheme. In my own experience I have come to favor a sighting of 3.5 inches high at 100 yards. This allows for the individual to hold dead-on (directly in the middle of the top and bottom) the animal out to roughly 350 yards.
Magnum calibers such as the 7mm Remington and 300 Winchester will extend this slightly. At 400 yards I hold directly on the backbone of the animal. The drop at this range allows the...