In the era '64 to '70 there were many plans hatched to 'beat' the records but what the results were I don't know. Certainly many schools in that period set themselves a target of equalling the number of launches as their school number ie '6XX'; I can remember seeing a 'plan' at my school (613 Halton) to try to do it so maybe somebody at HQAC suggested it and they all gave it a go.
I doubt that HQAC or 2 FTS as it's now called would keep records going back that far; they're notoriously bad at collecting statistics like that let alone storing the records somewhere and don't forget HQAC has moved several times since the '50s; I remember it as being at White Waltham until the early '60s, then it went to Brampton then Newton before finishing up at Cranwell and it's easy to 'lose' a filing cabinet of records in these moves.