Almost any scope will live a long life on a 50. The recoil from most 50s is far less shocking than that of many of the bigger magnum ie 30x378, 378 wby etc.
I have seen guys use Elite 3200s and up with no problem. Personally all of my own 50s wear Nightforce scopes, and 1000 yards is really close range for a 50 by the way.