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...