March 16 2013 Bristol Food City 500 Happy Hour Practice Speeds and 10 Lap Averages Ryan Rantz Practice Speeds Bristol Food City 500 10 lap averages, Bristol Food City 500 average speeds, Bristol Food City 500 Happy Hour Speeds, Bristol Practice Speeds, Fastest In practice, NASCAR Bristol Food City 500 Happy Hour Speeds and 10 Lap Averages (PDF) More