Several years ago, I acquired a nice Alexander Henry under-lever hammer double chambered for the 20/.577 Express cartridge. I restored it, and take it hunting buffalo occasionally with good success. I believe this to be a fairly rare chambering these days, and know of only one other which was sold from Australia into the US last year. It too was an Alex Henry.

Holland & Holland have illustrated this cartridge in their early catalogues, probably before the turn of the century, but I have no details of rifles so-chambered. I believe it was a popular tiger cartridge in the black powder era.

Which leads me to the question: do any fellow-posters currently have possession of a rifle or rifles in this chambering? Does anyone know of a rifle chambered for the 20/.577? If so, would you be so kind as to post a few details for the enlightenment of us all! Surely there are more than two of these marvellous rifles left!

http://www.australianhunting.net/library/oneoftheharderones.html