| Inns | HS |
| 216 | 44 | Old Amplefordians v Rugby Meteors | Ampleforth College, Ampleforth | 1984 |
| 201-7 | 37 | Old Amplefordians v St Edward's Martyrs | Ampleforth College, Ampleforth | 1970 |
| 196 | 49 | Old Amplefordians v Old Cholmeleians | Highgate School Ground, Highgate | 2007 |
| 195-9 | 38 | Old Amplefordians v Old Cliftonians | Clifton College Close Ground, Clifton | 1982 |
| 170 | 30 | Old Amplefordians v Radley Rangers | Ampleforth College, Ampleforth | 2006 |
| 167 | 44 | Old Amplefordians v Oundle Rovers | Ampleforth College, Ampleforth | 1977 |
| 162 | 40 | Old Amplefordians v Repton Pilgrims | Repton School Ground, Repton | 2016 |
| 158 | 31 | Old Amplefordians v Old Alleynians | Dulwich College Ground, Dulwich | 1993 |
| 155 | 26 | Old Amplefordians v Lancing Rovers | Ampleforth College, Ampleforth | 1994 |
| 152 | 37 | Old Amplefordians v Haileybury Hermits | Haileybury College Ground, Hertford | 2014 |
| 148-7 | 36* | Old Amplefordians v Old Wykehamists | Ampleforth College, Ampleforth | 1977 |
| 148 | 39 | Old Amplefordians v St Edward's Martyrs | St Edward's School Ground, Oxford | 1983 |
| 146 | unknown | Old Amplefordians v Old Cheltonians | College Ground, Cheltenham | 1974 |
| 146 | 38 | Old Amplefordians v Oundle Rovers | Oundle School Ground, Oundle | 1991 |
| 144 | 43 | Old Amplefordians v Old Tonbridgians | Ampleforth College, Ampleforth | 2000 |
| 142 | 39 | Old Amplefordians v Repton Pilgrims | Repton School Ground, Repton | 1985 |
| 139 | 45 | Old Amplefordians v Old Malvernians | Malvern College Ground, Malvern | 1998 |
| 137 | 40 | Old Amplefordians v Old Westminsters | Vincent Square, Westminster | 1984 |
| 132 | 36 | Old Amplefordians v Radley Rangers | Ampleforth College, Ampleforth | 1971 |
| 131-6 | 38 | Old Amplefordians v Eton Ramblers | Upper Club, Eton College | 1986 |
| 128-9 | 36 | Old Amplefordians v Downside Wanderers | Downside School, Stratton-on-the-Fosse | 1990 |
| 128 | 25 | Old Amplefordians v Old Wellingtonians | Wellington College, Crowthorne | 1999 |
| 127 | 36 | Old Amplefordians v Old Wellingtonians | Wellington College, Crowthorne | 2018 |
| 122 | 43 | Old Amplefordians v Shrewsbury Saracens | Ampleforth College, Ampleforth | 1988 |
| 122 | 43 | Old Amplefordians v Eton Ramblers | Ampleforth College, Ampleforth | 2025 |
| 121 | unknown | Old Amplefordians v Old Brightonians | Brighton College Ground, Brighton | 1972 |
| 121 | 37 | Old Amplefordians v Eton Ramblers | Wheely Down Road, Warnford | 1976 |
| 116-7 | 45 | Old Amplefordians v Shrewsbury Saracens | Ampleforth College, Ampleforth | 1981 |
| 106 | 40 | Old Amplefordians v Repton Pilgrims | Repton School Ground, Repton | 2011 |
| 106 | 31 | Old Amplefordians v Old Cheltonians | Ampleforth College, Ampleforth | 2024 |
