Justin Jackson’s Historic 3-Point Improvement Posted Feb 20, 2017 After making 29% of his 120 3-pointer as a sophomore, Justin Jackson has improved to 39% on 178 attempts as a junior. That increase of 10 percentage points is a healthy one. But where does it rank in ACC history? Prior to this season, only 11 ACC players have had a 10-percentage-point increase in their season-over-season 3-point percentage. (The Secondary Break)