Correct, I was commenting upon the LRF 800. I should have been more specific.
The longest reads I have achieved have been on antelope. The readings were between 805 and 812 yards.
I've had reads on non-targets at farther distances, however, I would prbably not shoot a target with such readings as I don't know that they can be trusted. I just don't know enough about finders and their calibration. Besides, 800 yards is my limit. Quite honestly I have yet to break the 600 yard barrier on a big game animal. (I shoot a quarterbore)
The farther out the target is, the better your technique needs to be. I use a light bag, (sock), to rest the finder on when working from the prone.