The thing to realize with rangefinders is the question is absolutely not about accuracy... the question is yes/no; did you get a reading?

If you got a reading and the square/crosshair/dot was in the right spot the number will be impossibly correct. The problem is when the unit fails to get a reading. The better the unit the more times it will get a reading.

On more than one occasion I have had a number of different units going at once and they produce virtually exact numbers every time... until they fail to get a reading.

Mark Begich, Joaquin Jackson, and Heller resistance... Three huge reasons to worry about the NRA.