Safari Club's magazine contains a series of articles by Stan Skinner that touch on on this subject. The third installment was in the January/February 2008 issue. He tested 11 different name brand dangerous game scopes by firing at least 60 rounds each on top of an unbraked Weatherby .460 magnum. All of the scopes survived this test. He noted that weight and reticle design were two important attributes of a dangerous game riflescope.
He concluded that "...a good quality riflescope is capable of withstanding just about any punishment you can subject it to, assuming normal use....despite this fact, an occasional defective scope slips through....From all indications, a broken scope is pretty rare, and our experience during this test reflects the norm more closely than do these tales of failures."
However, during the test "....we sheared off scope base screws, bent Picatinny rails, and damaged the recoil lugs on otherwise sturdy Warne scope rings. These things invariably happened while testing the heaviest of our test scopes....Accordingly, we recommend choosing a relatively lightweight, compact dangerous game scope."
As to reticle design, he concluded that: "In general, a bold design that is easy to pick out in poor light conditions is best and an illuminated reticle helps you pick out your aiming point quickly."