In his linked article about 5 most underrated cartridges he listed the 9.3mm. I shook my head on that one. Many fine 375 H&H Magnums that can easily be loaded down to 9.3 levels. There are many file (expensive) 375 H&Hs, but a CZ 550 American Magnum is affordable and shoots well.
I don't know why I took these out in the canoe!
You Fool! How could you recklessly expose those fine weapons to irretrievable loss like that? Sorry to hear of your tragedy