I have shot more game in africa with a 9.3 (62 and 74R) that all my other calibres put together.
What one should remember is that neither the 375 or the 9.3x??? are killing calibre medium bores not a stopping calibres!!! That said the PH would rather have a 9.3 or 375 bullet in the vitals or a DG animal that a shot to the guts with any big bore.

In my opinion the 9.3 should be used my a shooter that is a very good shot and won't take a marginal shot and wait for correct shot placement in the vitals.