"While I was not present at the 6.5mm kills on buffalo as I understand it, both were shot well broadside in the chest. One ran away and the PH insisted follow-up shots be fired. Which were into the rear of the buffalo and as Orion expected had no effect. The other was also shot with follow-up shots as again the PH insisted"

Hmmmm....... wonder if I dare put my foot in murky water and ask if we think what the results would have been for identically placed shots had the caliber been a :-

1. 9.3x62 or 9.3x74
2. 375 h&h
3. 416
4. 458win mag or Lott and above etc

Any thoughts??