EDELWEISS,
One of my hunting pals has used the 9.3x74R on two PG safaris (once a Ruger #1 / Zeiss 4x in Ruger rings and once a Simpson & Sohn drilling 12/12 over 9.3x74R, also similarly scoped but in claw mounts).
He used the 286 gr Nosler Partition, hand loaded to original factory specs (2350 fps? but my geezer memory is not positive on the velicity any more).
On these two hunts, he shot quite a menagerie of critters, small (springbok), medium (nyala) and large, (huge old cape eland blue bull) plus many other Limpopo and Kalahari species, with great satisfaction.
Even the eland went swiftly down for keeps, upon being shot once through the heart/lung - "boiler room" with it.
He refers to that cartridge as the "big stick in a small bundle".
I have fired his Ruger and a Beretta "Sable" model O/U double he once owned, with an older (1970's vintage) 3x Leupold scope. (He sold the Beretta to buy the aforementioned Simpson drilling).
We fired them out to 300 yards, with the above mentioned N. Partition loads, on a proper rifle range and neither of us had any trouble hitting our targets that far out there.
Unfortunately, that particular range (Birchwood Range, Anchorage Alaska) only goes out to 300 yds, or I would have had a report for you on longer shots as well.
At 300 yds, the 286 gr may not have super high velocity but it evidently has plenty enough to ring the steel gong out there with a mighty sound.
As other shooters present would hit it with lesser calibers, such as the .308 and .30-06, their impacts sounded almost feeble, compared to the satisfying loud CLANG! of those 286 grainers.
I feel this cartridge loaded with sturdy 286 grain JSP bullets, is one of the very best of the best PG choices for all but the most open grassveld/treeless spaces, where one would likely be pressed into 400+ yard shots more than once in a blue moon.
Cheers,
Velo Dog.