My kid scored 1300 on the fall PSAT 10 as a sophomore, 1400 on the spring PSAT 10, then 1480 on the PSAT/NMSQT in the fall of her Junior year. So from 1300 to 1480 between fall 2016 and fall 2017.
She didn’t really prep.
@homerdog with a PSAT of 1490 the minimum would have been 222, though it could have been as high as 225.