I'm not sure exactly without looking it up, but being that I am 2.5 inches high around 80 yards it would be less at 50 and even less than that at 25.

I don't really concern myself with it since if the deer is that close I can just put he cross hairs on it and pull the trigger. I can't make a 25 yards shot out of my blind anyway because of the angle and window placement. I would have to lean out the window to pull it off.

Paul