Roy Williams kept saying that he had a good shooting team, that North Carolina would knock down more 3-pointers sooner or later. On Sunday, at least, the Tar Heels (No. 8 ESPN/USA Today, No. 7 AP) proved their Hall of Fame coach right. Harrison Barnes scored 23 points and North Carolina hit 10 3-pointers in a 93-81 victory over Georgia Tech on Sunday that ended a four-game losing streak to the Yellow Jackets.