Ours was taking 90-100mls at a go and sleeping 3 hours. Last couple of nights at night time he has been very unsettled (seems colicky? Screaming and crying a lot after a feed) and last night DH decided it was because he was hungry and gave him a whopping 140mls. He drank it and did eventually settle for a few hours but I am not convinced that it was a good idea. Surely that's an awful lot for a 2 week old? He woke this morning and I gave him 100mls and he fussed a bit and then settled with swaddling and a dummy but I'm not sure he'll stay settled now (probably just me being anxious now- I'm knackered! lol)
I have no idea if big feeds like that would harm him. It seems so much. He's on Aptimel comfort because he wasn't pooing for a while but poos now seem to be happening at least once a day.