I've used that combination on mule deer effectively but not in Africa,

However, I've used the 180 grain Nosler Protected Tip Partition in a 300 WSM at about 2975 fps MV to take about 25 PGs ranging from steenbok and impala to eland, zebra and kudu without any problems. I can't recall needing a 2nd shot on anything,

I definitely think your 300 RUM and 200 grain PT will work just fine. Enjoy your trip.

Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it Almighty God! I know not what course others may take, but as for me, give me liberty of give me death! P. Henry

Deus vult!

Rhodesians all now