Visual range estimation is one of the most difficult elements of long-range marksmanship. You can have an amazing rifle, match ammo and perfect trigger control, and you can memorize the ballistic and atmospheric charts for your favorite handload, but you’ll never pass for Carlos Hathcock or Matthew Quigley if you don’t know the range to your target within a handful of yards. Laser rangefinders like the Leupold RX-800i/TBR make this challenging task a whole lot easier.
