Milt
The feel and centering mechanism for the B777 for both the wheel and column is a simple cam and roller mechanism.
For the aileron it is something in the order of 2kgs at breakout to 6 kgs at full travel.
For the column it's 3kgs to 19kgs at full travel low speed and 19kgs to 90kgs at high speed.
A bit of a simple description but I hope it helps!