The range varies quite a bit depending on completion.
We have quite heavy 850 with PATS tanks installad.
If we would choose to fill up the aux PATS tanks giving us around 4000lbs of extra fuel, we would be able to put in just about one pilot and there would be the max ramp weight.
With only few pax, you can go somewhere, but with the full load with our aircraft, 2300NM would most likely be about the max.
However, I have heard that there are better examples around.