Based on personal experience, the Swift A-Frame did well on the buffs I've killed as a first shot from both my .416 Rigby and .470 NE. I believe in a soft up and solids down in a magazine rifle.
Again based on personal experience, the Nosler Partition is a great cat bullet, but I have been less than enthralled with it's performance on larger African game. It does not hold together nearly as well as an A-Frame does. For that reason, I would never use a Nosler Partition on a buff.
On my upcoming DG hunt, I'm only bringing my .470 and am going to give Woodleigh cup point solids as loaded by Federal a try.
In my experience, any bullet can fail. Careful bullet selection and good shot placement can minimize the potential for failure. I know that some folks on the 'Fire will claim to have dropped a Stegosaurus in it's tracks with a Nosler Partition, but with no disrespect meant, that bullet would not be my choice for such a task.
