My good buddy has one of these as his collectors piece.
But every few years he brings it out of the armoury for a handful of 'test rounds' down at the range :)
I had my camera handy and with the video function rolling we gave it a little dance against steel discs at 100 yards :D

YouTube - Elephant Rifle - Winchester .405 'Teddy' Roosevelt Rifle. Model 1895

Slams like a bear, punches like a train...