That, Gents… Is old Dagga Boy for you. 51 plus years of hunting in Africa & their resilience never ceases to amaze me.
But practically speaking… this video proves extremely educational for the novice nimrod by showing that there’s no such thing as a “Magic Failproof caliber”. A big bore rifle is only as useful as the operator firing it. If you can’t place your bullets in the appropriate vital spot (heart, lungs, spine, brain), then (short of a 40mm rocket propelled M203 grenade) no caliber will drop big game reliably.
As much as I adore the .600 Nitro Express (I dream of owning a Heym Jumbo sidelock ejector in this caliber someday)… even I must point out that Mr. Sundles would have been far better served with a telescopic sighted (not too high magnification) .375 Holland & Holland Magnum magazine rifle propped up on sticks… considering the ranges that he was firing at. The lesser recoil would contribute to more accurate initial shot placement.
If you want to successfully hunt Cape buffalo (or indeed, any big game be it dangerous or otherwise)… then:
1) Study the anatomical diagrams of the game animals which you intend to pursue.
2) Know the limits of your own strength and accept it instead of trying to deny it. It’s far more advisable to fire a lighter caliber more accurately than to just blaze away at any visible part on the game animal with heavy artillery.
3) Practice shooting off sticks. It’s absolutely nothing to be ashamed of (even though I personally still prefer to shoot offhand myself).
4) If you want to shoot a double rifle, get closer. If you want to shoot from relatively longer range, get a magazine rifle (although I personally think 80-85 yards is just about as far as you want to hunt Cape buffalo from, anyway)