I have a Leupold RX-600 that I use to Range things with when I'm Bow Hunting,then as several mentioned I remember the distance because usually when an Animal comes in there's no time to be messing with a Range Finded and getting the shot!

I probably use it more when Coyote Hunting to see the distances across more open Fields and to double check the distances before and after the Shot.I'm lousy at judging distances so a Range Finder was a must in my Gear Arsenal.