What is the farthest you have ranged a deer at? What rangefinder were you using?

What is the farthest object you have ranged? What was it? What rangefinder did you use?

Seems like answering these questions will be a big help for those of us in the market for a rangefinder and don't want to be surprized by a product which says 1000 yards, but only ranges deer to 200 yards.