I am a true believer in NorthFork bullets for anything, however their standard expanding bullet may not give full expansion on smaller ungulates. ( Wildcatter82 please correct me if I am wrong.) If you are using them on the smaller PG try the "Lion" bullet. I think it is called the PP expanding bullet. It will expand better/quicker on the smaller animals.
NF has all the bases covered from small cats to the biggest dangerous game.
Also, Did you know that the ogive. ( bevel on the edge of the nose.) on the NF Cup Point Solid is 13 degrees. This angle was arrived at, through exhaustive testing, as the exact angle to give the largest most permanent wound channel and still feed through a bolt action rifle.
Did you know that the fine driving bands on the NF bullet give excellent internal ballistics and makes the NF bullet good-to-go in double rifles.
The NorthFork bullet and the Cutting Edge Bullet are my favourite bullet for cape buffalo. The CEB solid has the same nose design as the NF solid.
Next buffalo hunt I will be using mostly Peregrine BushMaster VRG3 bullet. This bullet has a plunger in the nose that initiates controls expansion.
I have found that I can adjust the amount of expansion to what I want by adjusting the velocity up or down from 1,800 fps to 2,100 fps. The expansion is always symmetrical. It is a very impressive bullet.
As far as I am concerned the above three bullets are the best for me on cape buffalo.