I'm pasting this from an old thread.
The scale only changes slightly from test to test
AAMC V
Verbal
12 & above 55-65
10-11 48-54
9 44-47
8 40-43
7 37-39
6 32-36
5 29-31
4 & below 0-28
Physical
12 & above 65-77
10-11 58-64
9 54-57
8 48-53
7 42-47
6 36-41
5 30-35
4 & below 0-29
Bio
12 & above 66-77
10-11 58-65
9 53-57
8 48-52
7 44-47
6 39-43
5 34-38
4 & below 0-33
AAMC VI
Verbal is identical to AAMC V
Physical
12 & above 65-77
10-11 57-64
9 53-56
8 48-52
7 42-47
6 36-41
5 31-35
4 & below 0-30
Bio
12 & above 64-77
10-11 54-63
9 49-53
8 44-48
7 41-43
6 36-40
5 32-35
4 & below 0-31