Hes already one of the most successful jockeys in Hong Kong racing history and Zac Purtons storied career hit another milestone on Sunday, racking up his 1,300th winner.The four-time champion reached the mark aboard the David Hayes-trained Kings Capital in the Class Four Ngau Tau Kok Handicap (1,400m) at Sha Tin.Purton, who made the move to Hong Kong in 2007 and is second in all-time winners in the jurisdiction, was pleas