Feeding more than 240ml a feed..

[Rowellen]

My DS often had more than 240ml. He would polish off 400ml some nights. He was a bit older than your DS when he did that though - 10 -12 mths. Now he only has 200ml but he still has a feed overnight most nights of another 150ml. If your DS's weight is fine, then I don't think it matters how much he drinks.
HTH

[RhiChiChi]

Sounds like he needs to extra milk - have you considered introducing a small amount of solids given he is nearly six months?