| Tournament | Round | Mary McMahon | Meg Henderson |
| 08.06.1998 Victorian Championships (VIC) | 12 | 402 | 392 |
| 05.04.1999 Australian Championships (NSW) | 20 | 327 | 494 |
| 22.07.2000 Melbourne Open (VIC) | 5 | 441 | 399 |
| 03.12.2000 McKinnon (VIC) | 2 | 468 | 297 |
| 21.01.2001 Aestival (VIC) | 1 | 280 | 433 |
| 29.04.2001 Western Suburbs (VIC) | 3 | 417 | 300 |
| 10.06.2002 Victorian Championships (VIC) | 16 | 340 | 412 |
| 09.06.2003 Quen Elizabeth Derby (VIC) | 1 | 440 | 338 |
| 13.06.2005 Victorian Championships (VIC) | 12 | 355 | 481 |
| 25.09.2005 Essendon (VIC) | 6 | 357 | 332 |
| 27.11.2005 McKinnon (VIC) | 4 | 331 | 435 |
| 28.12.2005 Decathon (VIC) | 3 | 349 | 308 |
| 07.01.2006 Mind Sports (VIC) | 1 | 376 | 279 |
| 11.06.2012 QUEEN'S BIRTHDAY (VIC) | 1 | 385 | 375 |
| Head-to-head after 14 games | 9 | 5 | |
| Average score | 376.28 | 376.78 | |
| Spread: | -7 | 7 | |