Keith Ubert on Saturday made his Greater Iowa Bowling Association debut a winning one, taking the Big Gun tournament in Marshalltown, GIBA reported. Ubert fired a 299 in the 10th and final game to finish with a 2,370 total, 57 pins more than runner-up Rob Aimers. First was $1,000, plus $210 in the Bet You Win pot. Second was $700. Ubert also cashed twice in the optional doubles, winning with Rick Miller and finishing third with Brian Menini.  The tournament drew 55 bowlers, with 16...