| Tournament | Round | Joy McGowan | Joan Colburt |
| 03.05.1998 Maelstrom (QLD) | 3 | 323 | 505 |
| 13.09.1998 Toowoomba (QLD) | 4 | 464 | 302 |
| 11.10.1998 Greenbank (QLD) | 5 | 443 | 339 |
| 15.11.1998 Oyez (QLD) | 1 | 299 | 550 |
| 21.03.1999 Redcliffe (QLD) | 6 | 370 | 317 |
| 02.05.1999 Maelstrom (QLD) | 1 | 412 | 376 |
| Head-to-head after 6 games | 4 | 2 | |
| Average score | 385.16 | 398.16 | |
| Spread: | -78 | 78 | |