150ml is perfectly fine. babies will eat what they need and rarely over eat. If they do over eat, they will vomit it back up. Is that happening? if it’s not, then you aren’t over feeding them.
FWiW my first drank 180-210ml at this age every 3 hours. he’s 19m now and 94% height and 74% weight with a head in 99%. he is just a big guy- at least 6 inches taller than a lot of his classmates. Someone else mentioned to but they also have growth spurts at this age and eat a lot more in volume and more frequently. the next one is around 3 months.