I was thinking about that lovely little Rodda that you showed me in Darwin a while back at Tex's and thought about sending an Em to see how you were going with the loads etc, when I saw your hunt story, great results.
I used the 440gn Woodleigh in my P. Webley & Son .500 3 inch and shot 3 buffalo with it (before parting with it) and found all three projectiles in the opposite side of the body, perfectly mushroomed (of course, Woodleighs are good) all one shot kills and one dropped immediately.
As a matter of curiosity, if you don't mind, what loads did you develop for your gun?

cheers
Chris