"But I played really solid. I gave myself good looks. And I think even when I made mistakes I was pretty calm about things."
The round was even more impressive given the players had to cope with a torrential downpour that affected the afternoon starters. Ko said that, overall, she's seen worse at Dundonald.
"I've played this course when it's been really, really strong winds and a hole where I hit a pitching wedge today could possibly be a long iron in or more.
"We barely had any wind, apart from that stretch when the storm came in. So I think that's why some of the scores were quite low and people were able to be a little bit more aggressive."
Ko sits in a three-way tie for second with USA's Lilia Vu and Frenchwoman Celine Boutier while Australian world number one Minjee Lee sits two shots behind on five-under.
Ko is attempting to improve on her second-place finish in 2021's version of the Scottish Open which saw the United States' Ryann O'Toole take out the title.