my personal favorites for all around use of the .30 in Africa:

.300 Wby/RUM: 200 TSX (if it doesn´t stabilize, 180 TSX), 200 Partition or A-Frame as a 2nd choice
.300 Win class: 180 TSX, 180 A-frame, 180 Scirocco
.30-06 class: woodleigh w/180 grs or A-Frame 180 grs

with TBBC I do not have any experience, but in spite of the construction it could be only good for the fast one 30s....