“This is my home course so I try to play it as much as I can when I’m home,” said Dantorp. “I can’t really explain how good the support I got today was.
“All my friends, all my buddies were here and there was so much applause. That was one of the biggest keys to my success today; it definitely helped me.
“Peter Hanson has helped me a lot. It’s great to go to the States to see him over the winter when you can’t practice here. He’s been a great mentor to me and has helped me through things, so I feel more comfortable in situations such as this.
“This season has been solid. I’ve not quite had the results I would have wanted but it will come, I’m sure. It’s all new to me so I’m taking it easy.”
That left them one ahead of two other Swedes, Rikard Karlberg and Sebastian Soderberg, Scot Stephen Gallacher and Dutchman Daan Huizing.
World Number Two Henrik Stenson opened with a three under par 69, one better than playing partner Thomas Björn, while defending champion Mikko Ilonen birdied the first and remained one under through three holes.
Qualifying School graduate Dantorp started on the back nine and turned in an impressive 32 before gaining further shots at the first and sixth.
Pepperell, who has finished in the top 25 on his last two appearances, was only three under through 14 holes, but followed a two at the short sixth with consecutive birdies to finish.
The 28 year old Karlberg, who predominantly plies his trade on the Asian Tour, started on the back nine with consecutive birdies and gained another shot at the 17th to turn in 33.
Further birdies at the long first and short sixth – the latter from 25 feet - took Karlberg to five under par, and he recovered from a missed short putt at the seventh with another birdie gain at the eighth.
Gallacher holed a six footer at the first and then birdied the third and fourth after turning in 34, while rookie Huizing almost holed his approach to the third for one of five unanswered birdies.