I think it has something to do with men having a quick muscle twitch of the right hand, which makes for a jerky trigger finger after several years.I took Competitive Riflery as one of my electives in college. First week we did a test and I was the highest score by a mile. By the final, two girls from Murfreesboro who had never seen a rifle before the class finished ahead of me and my score was solidly improved from week one. The instructor, who coached the Riflery team, said that was pretty typical. In general, women definitely have steadier hand eye coordination.