Going over 250 is perfectly possible to do legitimately, over 500 is suss though...I notice you have a score of 499, and your best ratios are with knife and pistol...play on K+P servers much? That's the kind of thing people sometimes get reset for (server history, not your stats).
Also the fact you have killed your worst enemy 172 times in one round would suggest you DO pad.
Also the fact you have killed your worst enemy 172 times in one round would suggest you DO pad.