Loading data is in the Hornady Handbook( I think it's the 3rd edition), A-Square, (who also seem to make cases), Vihtavuori printed a reloading booklet in 1992 with it, but it's not in the most recent booklet by them, Nick Harvey's Practical Reloading Manual (1st Edition), has it also. I'm pretty sure ADI of Australia have it in their booklet too.

Jeff Munnel wrote an article; "An Interesting Weatherby in a Very Interesting Caliber, (The 8x68S)" in The Accurate Rifle, March 2002. This includes reloading data and describes both RWS and Hirtenberg brass. He says, "I know an African P.H. who thinks the 8x68S is the best African antelope cartridge extant, and I find it impossible to disagree with him". I would think it'd be ideal for an African safari that included both antelope and baited leopard.

A-square state: "There are a large number of rifles chambered for this cartridge floating around Africa especially in the ex-German colonies of Namibia (German South-West Africa), and Tanzania, (Tanganyika). Their owners swear by the cartridge and use it as a yard-stick, (meter stick ?), to measure the performance of American cartridges".

The 8x68S was released in 1938 by RWS, (not Schüler, as Wikipedia states, the "S" stands for a .323" bore). Some years later the bullet design was changed to make the cartridge O.A.L. shorter to work through standard actions. It was also given a new bullet by RWS, the "KS" and this lit up sales in Europe where it is quite popular as "the German Magnum".