The Holywood man is sitting on +3 following Friday's play - currently a handful of shots off leader Phil Mickelson who is yet to finish for the day.
Rory said the course tests "every aspect of your game".
"(the round) was solid. It felt like every time I made a birdie, I made a bogey straight away," he said.
"It's a course you feel like you can shoot a score but because of the pins it's tricky."
He said despite what others had said going into the tournament, he "never saw scores such as 63s and 64s".
Meanwhile Northern Ireland's other golfing heavyweights are set to miss the cut after both landed double figure over-par scores.
Former winner, Portrush's Graeme McDowell, carded a 77 during his second round to end up +13.
Dungannon man Darren Clarke's Open winning performance in 2011 failed to find its way across the water as the 44-year-old finished the day on +15 following a second round of 75.
His opening day of 80 set the wheels in motion for an all-round disappointing opening two days of play.
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