Alan James of the Rhodesian African Rifles came across an elephant that had stepped on a land mine. When he went to put the poor beast out of its misery, the experienced elephant hunter was reminded that his FN FAL assault rifle was not an elephant rifle:
James had to empty the best part of a 30-round magazine into the unfortunate creature before it collapsed to the ground.
The FN FAL fires a powerful 7.62x51mm NATO round — what American hunters call a .308 — which is much bigger and more powerful than a 5.56mm (.223) round from an M16 — but nowhere near as big and powerful as a .577 Nitro Express elephant round.
(From Tools of Violence by Chris McNab and Hunter Keeter.)