May 25 2013 Charlotte Coca Cola 600 Happy Hour Practice Speeds and 10 Lap Averages Ryan Rantz Practice Speeds 10 Lap Averages, Average Speeds, Best speed, Charlotte Coca Cola 600, Charlotte Coca Cola 600 Happy Hour Speeds, NASCAR, NASCAR news, Practice Speeds Charlotte Coca Cola 600 Happy Hour Practice Speeds and 10 Lap Averages More