20 Minute Shooting
Great shooters aren't born, they're made through the commitment, discipline, and sacrifice of practice.
Nash was a career 180 shooter, meaning that the sum of his shooting percentage (1.822) from the field, three-pointers, and free throws exceeded 180. That's an epic accomplishment.
For example, Larry Bird was .496, .376, .886 (1.758)
Magic Johnson was .520, .303, .848 (1.671)
Michael Jordan .497, .327, .835 (1.659)
Stephen Curry .477, .444, .902 (1.823)
Klay Thompson .450, .420, .853 (1.723)
This only compares combined shooting percentages, certainly not comparing the breadth of players' games.
What it says, however, is that his process, the sum of his preparation and his shot selection achieved stunning success, as over his long career, his numbers approximated that of Steph Curry's brief but scintillating career.