On a slightly different note just reading Andrew Salmon's Scorched Earth, Black Snow on the 27th Brigade in the Korean War and lo in the central picture part of the book (I like a book with pictures...) is the RAR's Robbie 'The Hitman' Robertson who, the caption has it, was trained to shoot out to 1,000 yards - along with his weapon, a good old SMLE HT (looks like high mounts to me).