Queanbeyan ended up on the right side of an amazing six-run victory against Tuggeranong to secure the club's third John Gallop Cup in the past four years.

Chasing 137 for victory, Tuggeranong slumped to 9-115 before tailenders Luke Ryan and Alex Floros fought hard to get it over the line for its first 50-over title since 2007-08.

But Ryan's determined knock came to an end when he chipped off-spinner Mark Solway to captain Blake Dean to spark wild celebrations among a jubilant Queanbeyan side.

"It's an unbelievable feeling,'' Dean said. "This is the best game I've ever been a part of.

"It took absolute guts for our boys to get up, but both teams were absolutely outstanding, it nearly deserved a tie.''

Tuggeranong all-rounder Shane Devoy played a terrific lone hand with a well-made 64 after earlier taking 2-20 with the ball, while veteran Queanbeyan paceman Dean Southwell tore through the line-up with 4-36.

Known more for his left-arm orthodox bowling, Devoy held his composure as wickets fell around him on a difficult deck for batting.

But when he was dismissed leg before to his ACT Comets teammate Vele Dukoski still needing 22 runs to win, Queanbeyan was in the box seat.

That brought Floros to the crease, the last man in taking a patient approach with Ryan.

Queanbeyan's innings had more ups and downs than a rollercoaster.

Opener Jono Dean, back in the side after his stint with the Adelaide Strikers in the Big Bash League, fell for just eight as Queanbeyan stumbled to 4-48. A valuable 77-run partnership between Dean Solway (52 off 89) and Michael Curtale (45 from 48 balls) got the innings back on the track.

Then the crash happened in dramatic fashion, Queanbeyan losing its final six wickets for 12 runs to give Tuggeranong the momentum heading into its innings.

Adam Ritchard (2-14 from seven), Devoy (2-20 from 8.1) and Michael Wescombe (2-34 from nine) shared the spoils.

Tuggeranong found the going just as tough.

Devoy was one of only three batsmen to reach double figures as Tuggeranong crumbled from 3-66 to 8-92.

Southwell received great support from Sam Taylor, who claimed 3-24.

AT A GLANCE

John Gallop Cup final: QUEANBEYAN 136 (D Solway 52, M Curtale 45; A Ritchard 2-14) beat TUGGERANONG 130 (S Devoy 64; D Southwell 4-36, S Taylor 3-24) by six runs at Manuka Oval on Sunday night.