In a contest in an open gym I bet Max Hooper could beat chris too.
What separates Mullin, Curry, Reggie Miller, Ray Allen etc from the open gym heroes is that they can get their shot off in a real game. They can step-back, run around a screen or two, or fire lightning quick on a catch and shoot etc.
Not saying the German isn't good. But empty gym shooting contests are like throwing footballs through a tire in the backyard. Ryan leaf and JaMarcus Russell can look like hall of Famers doing that.