Mathew- I don't have any personal experience with the Shephard scope but I do have a few scopes with rangefinding reticles.
My nightforce is a great scope but for rangefinding it leaves a little to be desired. So do most ranging scopes because you have to have it at full magnification for it to be accurate. Now that's great if you've got the time to locate your target, zoom up to max power, and range him, but chances are by that time he'll be 100 yards closer than he was when you started.
The other rangefinding scope I have is a Springfield Armory. That scope will accurately range at any power BUT, when you're on low power the crosshairs and ranging brackets are barely visible.
Pick your poison. I still use both scopes, but I don't use the rangefinders in them at all anymore. I use my laser rangfinder to range bushes and trees in the area when I sit down and just let the games begin.