450 grain A-Frames, save your solids for elephant.
My current count is 135 buffalo on three continents. 123 are with the .458. Of those, its a fairly even split in numbers between A-Frames, CEBs and TSXs with some mono solids thrown in.
Brush eats CEBs, its a bitch of a handicap when your bullet breaks into 7 pieces because it hit a twig.
Solids suck. Might as well shoot a pig with a pellet gun.