| Tournament | Round | John Hamilton | Chris Ostrowski |
| 17.03.2007 Wyong (NSW) | 5 | 271 | 375 |
| 09.04.2007 Australian Championships (NSW) | 21 | 384 | 346 |
| 09.09.2007 Hills Open (NSW) | 2 | 431 | 378 |
| 02.11.2008 Nowra Bomaderry 2008 (NSW) | 13 | 400 | 400 |
| 02.11.2008 Nowra Bomaderry 2008 (NSW) | 14 | 401 | 354 |
| 17.07.2011 Winter Masters (NSW) | 13 | 445 | 386 |
| 04.11.2012 Nowra (NSW) | 8 | 440 | 404 |
| 16.02.2013 Oatlands Free (NSW) | 5 | 430 | 461 |
| 23.03.2013 Bomaderry (NSW) | 1 | 487 | 364 |
| 18.08.2013 Baulkham Hills Open (NSW) | 8 | 414 | 369 |
| 10.11.2013 ACT CHAMPIONSHIPS (ACT) | 4 | 438 | 350 |
| 20.07.2014 Winter Masters (NSW) | 10 | 459 | 311 |
| 12.03.2016 BOMADERRY (NSW) | 8 | 477 | 411 |
| 14.10.2017 Spring Marathon (NSW) | 4 | 420 | 412 |
| 12.08.2018 WYSC Fundraiser (NSW) | 7 | 374 | 349 |
| 01.12.2018 Sutherland Shire (NSW) | 6 | 421 | 353 |
| 16.04.2022 Australian Championship (QLD) | 3 | 383 | 379 |
| 07.08.2022 Revesby (NSW) | 1 | 454 | 294 |
| Head-to-head after 18 games | 15.5 | 2.5 | |
| Average score | 418.27 | 372 | |