No 2 bullies are the same and what works for one won't always work for another. I feed my baby 1 cup (225 grams) twice a day and thats it or she will have explosive poo. Many others feed 1 cup 3 times a day without issue until 6 or 7 months and then they remove the middle feeding and split it all between 2 meals. You will have to do some trial and error to find what works best for your baby.
At 10 weeks it should be about 1.5 to 2 cups a day. Not sure that conversion in grams. If the stool is soft cut back some, if it's too hard feed a bit more.
You should also increase the food to about twice that much slowly as they grow. Feed that much until they are about 1.5 to 2 years old, then once you see they start gaining weight and looking a bit portly it's time to cut it back to 1 cup twice a day.
Thanks for your help everyone. Im pretty much giving him 1 cup 3 times a day at the moment, and he leaves a good bit of it and picks at it throughout the day. so it sounds like im doing ok. Thanks again