My first son started projectile vomitting when he was about two weeks old. He would eat, I'd start to change his diaper and he would just turn his head and out it flew, a good 6-8 feet. I talked to my pediatrician and found the miracle drops that we referred to as "the pink stuff."
I suspected the power behind his puking was air trapped in his tummy. So I gave him a full syringe of this lovely, bubble gum smelling stuff before AND after every feeding. It stopped the puking almost immediately. My husband thought I could be ODing the baby on this stuff and called the pediatrician who said it was impossible to OD on infant Mylicon drops. I say you give them a try, it was magic in a bottle for us.