| Tournament | Round | Joan Buchanan | Betty Irwin |
| 05.12.1999 ACT Christmas Capers (ACT) | 1 | 357 | 290 |
| 21.05.2000 Ulladulla (NSW) | 13 | 381 | 361 |
| 24.11.2002 ACT Championships (ACT) | 10 | 340 | 286 |
| 22.05.2005 Ulladulla (NSW) | 8 | 387 | 330 |
| 17.06.2005 Wollongong Marj Babb (NSW) | 2 | 354 | 378 |
| 21.02.2006 Ulladulla SUmmer Games Tuesday (NSW) | 2 | 348 | 340 |
| 28.05.2006 Ulladulla Championship (NSW) | 1 | 402 | 328 |
| Head-to-head after 7 games | 6 | 1 | |
| Average score | 367 | 330.42 | |
| Spread: | 256 | -256 | |