Here is a link to an article I have written for the Magnum Magazine on my 8x68S.
http://www.huntingsafaris.net/pdf/germanysgreateight.pdf
Nitrox used it last year to hunt some oryx, springbok warthog and a red hartebeest with it in Namibia. Maybe he can add some of his comments. So far, I have been very pleased with the performance of the caliber, mostly using 220gr Swift A-Frames. (Although some Swifts did fail. {I am contemplating moving to a stronger bullet like the Barmnes TSX.} These failures (3 in total) all occured from the last batch/ box of 50 bullets, and even after going through the considerable expense to send some of the recovered bullets and unfired ones to Swift, I still am without any explanation.) Notwithstanding, I can wholeheartedly reccomend the cartridge.