I purchased a CZ 550 Safari Classic in .416 Rigby 8 years ago and my gunsmith, as well as another, recommended I purchase a Burris Black Diamond 1.5 x 5 scope for magnum rifles. Burris advertises each is tested 500 or more times for durability/accuracy based upon expected recoil due to special springs between lens. Both gunsmiths have hunted elephant and Cape Buffs, among other African big game, a great number of times over 30 years or longer, using Zeiss, Leupold and other popular big name scopes, but were steadfast in recommending this Burris scope for high powered magnum rifles .375 and above. I placed on a detachable mount and have fired about 60 rounds through it and thus far no problems.
Kimbo