What we noticed pretty quickly was that neither rangefinder ever agreed…ever. Sometimes the difference was only a few yards, but sometimes it was 50 yards or more. In addition, my rangefinder also gave Weird Readings. It would say that a deer was 152 yards away when it was perfectly obvious the beast was way over 300. This may have been caused by fog, which we had, or by the beam bouncing off weeds and brush that I couldn't see but which the laser could. It was, as Richard Pryor used to say, a nerve-shattering experience.