Sweden's Ludvig Aberg has maintained a one-stroke lead on a day when low scores were in abundance on the Seaside course during the third round of the RSM Classic at St. Simons Island.

Aberg fired a 61 to sit at 20-under-par 192 heading into Sunday's final round in Georgia.

Playing partner Eric Cole also carded a 61 to sit in second place at 19 under. Mackenzie Hughes topped those scores with a 10-under 60 to vault into solo third at 18 under.

Aberg and Cole set career-lows with their matching 61s while Hughes ties his career-low. Aberg and Cole are in search of their first win on the PGA Tour.

Tyler Duncan sits fourth after a 62 and Sam Ryder fell to solo fifth after a "paltry" 65. Ryder is five shots off the lead.

Aberg has yet to post a bogey through 54 holes. He recorded four birdies and an eagle on five straight holes on the back nine to maintain his lead.

"You get a lot of wedges on the back nine, you get basically all of them, and then 15's a reachable par 5," Aberg said.

"I felt like I was striking the ball well. ... I felt I was striking the ball well and kind of took advantage of a little bit easier conditions today."

Cole also had a scintillating back nine, posting five birdies and an eagle. His only blemish was a bogey on No. 4.

"I wasn't hitting any bad shots or anything like that, just kind of mis-clubbed on the hole I made a bogey on," Cole said.

"Just tried to stay patient and not get in too big of a panic and kind of realise that if I continue to hit good shots, hopefully it will switch to making birdies instead of that one bogey."

Australian Aaron Baddeley carded a 67 to improve to seven under.