300kts on 10nm final is quite doable (on a 737), I have done it not too long ago.
Although not my favourite passtime, I do like a bit of flying once in a while....especially when the F/O dares you...
and for all those people that now say I'm unprofessional, on the contrary my friends, I chose this profession for the flying not for the tea and biscuits, so try and keep it safe.
If not certain of a stable approach at 500' then go around.
Take the blame and correct it for your next endeavour.
But for all these Willy Wonka's that never do anything remotely close to real flying, keep reading pprune in your 4x4 office, since there is no sense of reality