William Finaughty, one of the best Elephant Hunters in Southern Rhodesia, credited for hunting about 500 elephants in his 5 years career. https://archive.org/details/recollectionsofw1916will

James Sutherland is one of the most famous professional elephant hunters of all times. He carried a .577 Nitro Express which is referenced several times in his book, stating that with a 750 grain bullet it achieved better penetration than the 600 N.E with a 900 grain bullet. The Adventures...