Although i mostly hunt with my drillings for regular firearms seasons, i've killed a couple whitetails with a Chapuis in 9.3x74r. It exceeds the 'use enough gun' axiom, but you get great penetration and don't have any long blood trails. Never needed the second barrel. I carry it for black nears, but they fear it, so don't get near it.
Bfly

Be nice and work hard, you never have enough time or friends.