I'm not sure I'm comfortable with this thread.
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Apparently Rudyard Kipling had an opinion.
From his short story "The Undertakers"....
A shiny barrel glittered for a minute in the moonlight on the
girders. The Mugger [crocodile] was lying on the sand-bar as still as his
own shadow, his fore-feet spread out a little, his head dropped
between them, snoring like a--mugger.
A voice on the bridge whispered: "It's an odd shot--straight
down almost--but as safe as houses. Better try behind the neck.
Golly! what a brute! The villagers will be wild if he's shot,
though. He's the deota (godling) of these parts."
"Don't care a rap," another voice answered; "he took about
fifteen of my best coolies while the bridge was building,
and it's time he was put a stop to. I've been after him in
a boat for weeks. Stand by with the Martini as soon as I've
given him both barrels of this."
"Mind the kick, then. A double four-bore's no joke."
"That's for him to decide. Here goes!"
There was a roar like the sound of a small cannon (the biggest
sort of elephant-rifle is not very different from some
artillery), and a double streak of flame, followed by the
stinging crack of a Martini, whose long bullet makes nothing of
a crocodile's plates. But the explosive bullets did the work.
One of them struck just behind the Mugger's neck, a hand's-
breadth to the left of thle backbone, while the other burst
a little lower down, at the beginning of the tail. In ninety-
nine cases out of a hundred a mortally-wounded crocodile can
scramble to deep water and get away; but the Mugger of Mugger-
Ghaut was literally broken into three pieces. He hardly moved
his head before the life went out of him, and he lay as flat
as the Jackal.
I'm guessing a "double four-bore" would be a 4-gauge double-
barreled shotgun.