By Martyn Herman and Ed Osmond PORTRUSH, Northern Ireland (Reuters) -World number one Scottie Scheffler conjured up a brilliant 64 to lead the British Open after an enthralling second round as home favourite Rory McIlroy's roller-coaster ride continued at Royal Portrush on Friday.

Brian Harman took dead aim in a mild breeze and surprising sunshine Friday at Royal Portrush for a 6-under 64 that sent him into the weekend hunting another British Open title. He was called the “Butcher of Hoylake” when Harman won the claret jug at Royal Liverpool two years ago because the British press was fascinating by the Georgia native’s love for hunting.

The morning had been too beautiful for angst. A perfect day stretched across the near-perfect course, the forever blue of the Irish Sea painting an idyllic backdrop. Perhaps it was too early for distress,