By VICTOR A. PATTON victor@cvlocaljournalism.org If you know a registered voter in Merced County, chances are that person didn’t bother submitting a ballot for the March 5 primary. While that may sound discouraging, experts say there’s a good chance it won’t have much bearing on what turnout looks like in November. According to the Merced County Registrar of Voters, as of 5 p.m. Friday data show about 28.39% of the county’s 128,287 registered voters participated in the primary.