It’s time for Las Vegas to cowboy up and prepare for some western fun. The Cowboy Mounted Shooting Association plans its Scully Western U.S. Championships from 9 a.m. to 4 p.m. July 30-Aug. 2 with night events from 7 to 9 p.m. Aug. 1 at the South Point Arena & Equestrian Center, 9777 Las Vegas Blvd. South.