Marcus Kinhult picked up four shots in his first four holes to take a share of the lead early on day three of the Portugal Masters.
Oliver Fisher had made history in round two with the European Tour's first ever 59 and it looked like there would be low scores again at Dom Pedro Victoria Golf Course, with a host of players making moves through the field.
Swede Kinhult got to 13 under to sit alongside Australian Lucas Herbert and England's Eddie Pepperell, who both picked up a shot in their first three holes.
English pair Jordan Smith and Matt Wallace were then at 12 under, one shot clear of countrymen Fisher and Tom Lewis, Finn Mikko Korhonen and Italian Renato Paratore.
Kinhult got off to a flying start, making a birdie on the first and an eagle on the par four second to jump into a share of top spot.
That did not last for long, however, as Herbert made a long putt for an opening gain to edge into the solo lead.
Pepperell made a birdie of his own from five feet on the second to also get to 13 under but it was Smith who was the hottest man on the course and surging through the field.
The 2017 Porsche European Open champion had double-bogeyed his last hole on Friday but he quickly regained those shots on the second and third and when he added a further hat-trick to make it five birdies in a row, he was just one off the lead.
Kinhult birdied the fourth from 15 feet to get into a share and Wallace was just one back after he made a first gain of the day on the third.
Fisher's history-making effort on Friday meant that Lewis' excellent 63 went a little under the radar but the 2011 champion picked up where he left off, making four birdies in a row from the second to get 11 under.
Korhonen had birdies on the first, second, fifth and seventh to also sit in that group alongside Paratore who had birdied the second.
Fisher was the next man to join that group with a bogey on the third.
Defending champion Lucas Bjerregaard, 2012 winner Shane Lowry and 2011 Masters Tournament champion Charl Schwartzel were then in a group of eight players three shots off the lead.
