Zach Johnson fired an 8-under 64 Saturday to move into a share of fourth place at 15-under-par 201. He is joined there by Rich Barcelo (71), Guy Boros (66) and Craig Bowden (69).
Gangluff got off to a hot start at Highland Springs Country Club. He dropped his second shot within two feet to setup birdie at the first. He followed that by draining a 25-footer at the next to make it two straight.
The 27-year-old lost his momentum as he bogeyed the third. He came back to drop a 7-iron six feet from the cup at the sixth to setup birdie. He again made it two straight as he sank a 15-foot birdie try at the next. He stumbled again with a bogey at the ninth.
On the back side, Gangluff took advantage of the par-5 11th. His third was a short chip that came to rest six feet from the hole and he made the birdie putt. At the par-5 18th, he two-putted for birdie to grab a piece of the lead.
'Actually I played really well,' said Gangluff, who is searching for his first Nationwide Tour victory. 'I haven't been in the lead in so long. I just want to come out and make as many birdies as I can.'
LaBelle got off to a good start as well. His third to the par-5 first stopped 10 feet from the cup to setup his first birdie of the day. However, he struggled to back-to-back bogeys from the third to fall back to minus-12.
He halted the downward turn with a birdie at the sixth, where he sank a 15-footer.
Around the turn, he dropped a 4-iron within 20 feet of the cup at the 11th to setup an eagle. LaBelle finished with a flurry. He ran home a 15-footer for birdie at the 17th and followed that with a tap-in birdie at the last to close with back-to-back birdies.
'I played well today,' said LaBelle, who is also searching for his first title on the Nationwide Tour. 'I misread a couple of putts on Nos. 3 and 4 and came away with a couple of bogeys. The eagle on No. 11 jump-started me a little bit.'
Joe Ogilvie, the overnight leader, struggled to a 2-over 74. He fell to 14-under-par 202, where he shares eighth place with Blaine McCallister, Chris Tidland, Tom Carter and Trevor Dodds.
Boros and Ogilvie each have two victories on the season. If either were to gain his third title this weekend, he would gain the automatic Battlefield promotion to the PGA Tour.