T.R.
I have a 2 week old, and he just spits up a mouthful or so several times a day.. but my other two kids... totally different.. my 7 yr old would projectile at least a few times a week. I think he would eat too fast or too much. My babies are really big.. and he was gaining weight so the Dr. wasn't concerned. I have a friend who had a son who did the same thing, and he had acid reflux. I would talk to the pediatrician at your next appt.
Good luck!