Campbell has made four straight pars to start his round to lead compatriot Michael Hendry by two shots.
Hendry made one birdie in his opening five holes to move to 18-undr par, a shot ahead of 2011 Champion Brad Kennedy, who made a double bogey the first hole at Millbrook Resort today.
Fourth place is shared by Korea’s Sung-Jae Im and Australians Deyen Lawson and 2014 winner Dimitrios Papadatos.
Best of the movers is Australian Jack Wilson who is three-under par through seven holes to move to 15-under in a share of seventh with defending champion Matthew Griffin (AUS).
There are challenging conditions today with earlier persistent drizzle giving way to cool and strengthening winds.