As a team, the Trojans scored 135.292 points to finish second behind Altoona (137.551) and ahead of Hopewell (134.034).
Individually, Chambersburg was led by Darranique Burhanan-Barbour in the gold division (seventh all-around with a score of 34.525). She finished seventh in the bars (8.667).
Teammate Sammi Lowery was third in the beam in gold (8.867) and sixth in the bars (8.7).
In the silver division, Alicia Etter was 10th all-around (33.017) and 10th in the bars (8.050). Rebecca Colbert was second in the bars (8.350) and Aubrey Hammond took seventh in the beam (8.433).
Abbi Zeger led the way in the bronze division, finishing fifth all-around (31.284), fifth in the vault (8.6), eighth in the bars (7.467) and ninth in the beam (7.567).
Trojans coach Michelle Jones said, "It was a long day, but the girls had a great meet. They posted their season-high score. It was a great way to end the season. We're very proud of what we've accomplished."
Waynesboro took first in the Bronze Division with a team score of 129.126 to capture the state championship.
The Maidens finished ahead of seven other teams: Bedford, 128.108; St. Marys, 128.023; Bellefonte, 127.783; DuBois, 126.750; South Side Beaver, 124.991; Hanover, 124.483; and Ridgway, 107.793.
Waynesboro coach Amy Dennis said, "We are extremely proud of the kids we took to the state meet. They fought hard in a very competitive division and came away with a season-high score, and the right to call themselves 'state champions.'"
Pa. Classic Meet
Bars - 6.Sammi Lowery, 8.7; 7.Darranique Burhanan-Barbour, 8.667.
Beam - 3.Lowery, 8.867.
All-around - 7.Burhanan-Barbour, 34.525.
Bars - 2.Rebecca Colbert, 8.350; 10.Alicia Etter, 8.050.
Beam - 7.Aubrey Hammond, 8.433.
All-around - 10.Etter, 33.017.
Vault - 5.Abbi Zeger, 8.6.
Bars - 8.Zeger, 7.467.
Beam - 9.Zeger, 7.567.
All-around - 5.Zeger, 31.284.
Bars - 6.Brianna Gamero-Cheney, 8.133; 9.Jada Baker, 8.067.
Floor - 4.Baker, 8.65.
Vault - 6.Maggie McGahen, 8.55.
Floor - 2.Rachael Fleagle, 8.2; 8.Desi Stine, 7.95.