McNulty posted a three-under par round of 67 for a 36-hole total of nine-under par 131, opening a two shot cushion over first round leader Des Terblanche, in conditions that had most of the field staggering.
If there's one course that McNulty would love to pack in his golf bag and take around the world with him, then it would be the Wild Coast. He has won five tournaments as a professional on the stunning Robert Trent Jones designed course and also shot a 61 here last year.
'I have played the course in all winds, but still, it can bite you on any hole on any day,' McNulty said.
Starting his round on the 10th hole, McNulty covered the first nine in one over par following the bogey on the par-three 11th, but played his second nine in four-under par.
'I made a birdie on three, which put the wind back in my sails,' McNulty said. 'On the par-three sixth I used a three-iron into the wind and put it to four foot. It was a great shot - my best of the day.'
McNulty added birdies at the par-five seventh and the par-four tenth to really put pressure on his rivals.
'It's difficult to predict a result on this course,' McNulty said. 'Obviously I have the experience and I did play well but it's difficult to predict.'
There were only a handful of scores better than par and almost all of those came in the morning when conditions, relatively speaking, were better.
Zimbabwean Marc Cayeux was one of those players to benefit from the morning conditions as he posted a two-under par 68, leaving him just three-shots back of McNulty.
'The first six holes were pretty calm,' Cayeux said. 'The wind picked up after that and if I was teeing off in the afternoon I would have taken a 72. You have to alter your game when the conditions change and I think I'm learning to handle things like that now that I've been on the tour for nearly five years.'
The halfway cut was made at four-over par, 144.