The owner of a California shooting range who trained military personnel for Blackwater Worldwide said yesterday that “he will no longer work with the North Carolina company because of the notoriety of the government contractor.” Marc Halcon, owner of American Shooting Center, has been a Blackwater subcontractor since 2002, but now says he is “tired of being dragged into this thing” and no longer wants to be “associated with what he said was Blackwater’s questionable business practices.”