Having just done a few sectors in a B77-300 ER and looked at the loading data as supplied by B
Max T/O 341 T
Percentage per Main gear 46
So each Main Gear is taking 156.9 T
6 wheels per Boggie and the wheel loading is 26.2 T
Less than that quoted for the 747-4 and certainly less than the 777-300 at 299.3T max T/O