These are the number of losing records per bracket.

103: 2
112: 3
119: 3
125: 1
130: 1
135: 2
140: 2
145: 2
152: 2
160: 1
171: 1
189: 0
215: 2
285: 2

After intense statistical analysis I can determine that 189 will be the toughest weight class in 6A.