My BP is around 1100grams at the moment. I still feed him weekly, every Saturday. He still eats 4-5 adult mice every time. I don't force him to eat them either, I just ofer them and he swallows them right up.
Big pig if you ask me!
I don't think you can really 'over-feed' a snake if you're simply offering food to it. I'd never force a snake to eat unless it was a life or death situation.