| Runs |
Wkts |
| 634 | 17 | Marlborough Blues v Downside Wanderers | Marlborough College Ground, Marlborough | 2025 |
| 598 | 17 | Downside Wanderers v Old Tonbridgians | Downside School, Stratton-on-the-Fosse | 1993 |
| 583 | 17 | Downside Wanderers v Old Tonbridgians | Downside School, Stratton-on-the-Fosse | 1989 |
| 570 | 13 | Old Wellingtonians v Downside Wanderers | Wellington College, Crowthorne | 2001 |
| 533 | 8 | Rugby Meteors v Downside Wanderers | Rugby School Ground, Rugby | 1989 |
| 527 | 15 | Old Whitgiftians v Downside Wanderers | Whitgift School, Croydon | 1988 |
| 525 | 9 | Charterhouse Friars v Downside Wanderers | Charterhouse School, Godalming | 1990 |
| 516 | 18 | Stowe Templars v Downside Wanderers | Stowe School Ground, Stowe | 2005 |
| 501 | 11 | Downside Wanderers v Sherborne Pilgrims | Downside School, Stratton-on-the-Fosse | 1992 |
| 495 | 16 | Downside Wanderers v Shrewsbury Saracens | Downside School, Stratton-on-the-Fosse | 2008 |
| 473 | 12 | St Edward's Martyrs v Downside Wanderers | St Edward's School Ground, Oxford | 1978 |
| 471 | 12 | Rugby Meteors v Downside Wanderers | Rugby School Ground, Rugby | 2009 |
| 469 | 17 | Old Westminsters v Downside Wanderers | Vincent Square, Westminster | 1978 |
| 457 | 15 | Marlborough Blues v Downside Wanderers | Marlborough College Ground, Marlborough | 1986 |
| 457 | 14 | Downside Wanderers v Old Malvernians | Vincent Square, Westminster | 1986 |
| 446 | 14 | Downside Wanderers v Charterhouse Friars | Downside School, Stratton-on-the-Fosse | 2013 |
| 443 | 13 | Downside Wanderers v Marlborough Blues | Downside School, Stratton-on-the-Fosse | 1984 |
| 440 | 18 | Downside Wanderers v Old Whitgiftians | Downside School, Stratton-on-the-Fosse | 2015 |
| 433 | 16 | Radley Rangers v Downside Wanderers | Radley College Bigside Ground, Abingdon | 1999 |
| 431 | 14 | Downside Wanderers v Charterhouse Friars | Downside School, Stratton-on-the-Fosse | 1995 |
| 429 | 17 | Harrow Wanderers v Downside Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1983 |
| 425 | 17 | Downside Wanderers v Old Westminsters | Downside School, Stratton-on-the-Fosse | 1970 |
| 419 | 17 | Downside Wanderers v Old Whitgiftians | Downside School, Stratton-on-the-Fosse | 1979 |
| 419 | 9 | Felsted Robins v Downside Wanderers | Felsted School Ground, Dunmow | 1986 |
| 416 | 20 | Downside Wanderers v Old Brightonians | Downside School, Stratton-on-the-Fosse | 1988 |
| 405 | 20 | Rugby Meteors v Downside Wanderers | Rugby School Ground, Rugby | 1984 |
| 402 | 10 | Old Malvernians v Downside Wanderers | Malvern College Ground, Malvern | 1984 |
| 399 | 18 | Old Wykehamists v Downside Wanderers | Ridding Field, Winchester | 2000 |
| 395 | 11 | Sherborne Pilgrims v Downside Wanderers | Sherborne School, Sherborne | 1986 |
| 392 | 15 | Downside Wanderers v Old Malvernians | Downside School, Stratton-on-the-Fosse | 2007 |
