I think we are like most airlines.
The weight and balance form (loading schedule) used at Southwest Airlines is of the adjusted weight type, presented in tabular form. This format is based on the use of predetermined system of index units.
If we have a trim problem it usually is when there is light pax load. The "Loading Rule" then requires that a certain minimum number of pax be in the forward part of the airplane. Most pax will normally sit in the the forward part anyway.