FYI, a comparison of different bearing technologies wrt to load capability, from German literature, bearing types from left to right are:
white metal - two-metal - three-metal Pb-based - three-metal Sn-based - groove-type (Miba system) - Synthec - sputtered - lead-free sputtered w/ running-in layer
Thought you might find this interesting.
Cheers, Markus