| Inns | HS |
| 265 | 55 | Old Amplefordians v Haileybury Hermits | Haileybury College Ground, Hertford | 2004 |
| 264-8 | 93 | Old Amplefordians v Old Tonbridgians | Tonbridge School Ground, Tonbridge | 2013 |
| 243 | 67 | Old Amplefordians v Old Cheltonians | College Ground, Cheltenham | 2001 |
| 241-9 | 85 | Old Amplefordians v Uppingham Rovers | Middle Field Pitch 1, Uppingham School | 1999 |
| 241 | 98 | Old Amplefordians v Downside Wanderers | Downside School, Stratton-on-the-Fosse | 2004 |
| 233-9 | 65 | Old Amplefordians v St Edward's Martyrs | Ampleforth College, Ampleforth | 1995 |
| 231-6 | 68 | Old Amplefordians v Shrewsbury Saracens | Ampleforth College, Ampleforth | 2003 |
| 222-8 | 98* | Old Amplefordians v Bradfield Waifs | Ampleforth College, Ampleforth | 2009 |
| 217 | 81 | Old Amplefordians v Old Cheltonians | Ampleforth College, Ampleforth | 2022 |
| 216 | 44 | Old Amplefordians v Rugby Meteors | Ampleforth College, Ampleforth | 1984 |
| 211 | 66 | Old Amplefordians v Old Cliftonians | Ampleforth College, Ampleforth | 2003 |
| 209 | 73 | Old Amplefordians v Old Wellingtonians | Ampleforth College, Ampleforth | 1978 |
| 209-9 | 78 | Old Amplefordians v Old Malvernians | Malvern College Ground, Malvern | 1989 |
| 204-8 | 63 | Old Amplefordians v Old Cheltonians | Ampleforth College, Ampleforth | 1988 |
| 203 | 55 | Old Amplefordians v Uppingham Rovers | Ampleforth College, Ampleforth | 1969 |
| 201-7 | 37 | Old Amplefordians v St Edward's Martyrs | Ampleforth College, Ampleforth | 1970 |
| 201 | 63 | Old Amplefordians v Old Cholmeleians | Highgate School Ground, Highgate | 2010 |
| 200-8 | 84 | Old Amplefordians v Lancing Rovers | Lancing College Ground, Lancing | 1996 |
| 198 | 70 | Old Amplefordians v Harrow Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1969 |
| 198 | 58 | Old Amplefordians v Oundle Rovers | Oundle School Ground, Oundle | 1973 |
| 197-2 | 95 | Old Amplefordians v Old Wellingtonians | Ampleforth College, Ampleforth | 1988 |
| 197-7 | 72 | Old Amplefordians v Old Whitgiftians | Whitgift School, Croydon | 1994 |
| 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 |
| 194-6 | 52 | Old Amplefordians v Lancing Rovers | Ampleforth College, Ampleforth | 1981 |
| 185 | 57 | Old Amplefordians v Felsted Robins | Ampleforth College, Ampleforth | 1987 |
| 185-6 | 68* | Old Amplefordians v Uppingham Rovers | Middle Field Pitch 1, Uppingham School | 1997 |
| 184 | 55 | Old Amplefordians v Downside Wanderers | Downside School, Stratton-on-the-Fosse | 1977 |
| 182-8 | 58 | Old Amplefordians v St Edward's Martyrs | St Edward's School Ground, Oxford | 1992 |
| 178 | 56 | Old Amplefordians v Sherborne Pilgrims | Sherborne School, Sherborne | 2012 |
