I was about to start working up loads for my 338 RUM and have on hand Retumbo, H1000, RL22 and H4831SC. The data in quickload looks very promising for the H4831SC. Anyone else using this and if so what a kind of results have you gotten? Anyone have any good stuff for the other powders. BTW I will be loading a 250 Barnes TSX FB over this powder for an upcoming South African plains game safari in May. Thanks for any assistance any of you may offer!