Well, of course it is the 375 H&H...or is it?

From the NAPHA website, "5400 Joule for buffalo, elephant, rhino etc."

What does this translate to...will a 9.3x62 qualify? 9.3x64?

Her here is the formula: Joules: multiply the projectile weight in grams by the square of the muzzle velocity in metres per second (m/s), then divide the result by 2,000. So a 40g projectile fired at 800 m/s will generate (40 x 800 x 800)/2,000 = 12,800j

but rather than figure it out myself, surely this has been figured out before?

5400 Joule is possible with a 220 grains bullet(14,2 gram) shot in a 8x68S at a speed of 876 m/s (2874 fps)

I just checked the values for a 9.3x62, and it does not reach the specified value of 5400 J with either 250 or 286 grs bullets. Pity that.

I used load data and energy figures from Reloaders Nest and converted to Joule with OnlineConversion.com.

- mike

You're basically going to need a caliber/bullet weight combo that gives 4000 foot/pounds of energy at the muzzle according to their logic.

Thank you guys for looking into this-

Interesting formula--that 8x68s would be screaming at 2874..intuitively one might think the 9.3x62 would be rated higher.

Sort of tongue in cheek, but what do they do in Namibia, carry a "proof" formula around with them when they hunt? Surely there are agreed upon calibers- again, the might 375 H&H as a minimum...too bad I would like to use a nice 9.3 that I have....

are you sure there isn't a minimum bore or bullet weight?

my .300 wby mag "scores" 5492.9 joule at the muzzle.
i would much prefer a 9.3x62 for DG hunting.

I think the 9.3x62 with a handload is legal, at any rate those Nambian folks sure have a lot of 9.3x62 rifles in their closets.