Now THAT is a rifle. And a fantastic mustache....
I think some type of "safari" mustache is required when shooting any metric cartridge.
I don't have a clue who the WR belongs to, but the mustache belongs to Jim Corbett. That picture is with the Rudraprayag man-eating leopard he killed. His Rigby made .275 was a gift from the governor of the province for having killed it. I believe he owned a WR in .275 Rigby before that.