John Taylor reckoned the .577 Black Powder Express in 2 3/4 and 3" shell to be one of the most popular tiger rifles for a time. He goes on to say: "If I was concentrating on tiger or man-eating lion to the exclusion of everything else, I shouldn't hesitate: I would almost certainly have a double .577 built to handle the modern .577/75/650 load. Such a weapon need not weigh more than around 10 1/2 lbs."

One of the black powder loadings seem pretty interesting as a historical novelty at the least.