I usually shoot 4 or 5 times, each less powerful than the previous, then get a little dribble at the end. Sometimes my cum is really watery and I get more of a dribble, but still a couple of shots.
My volume, and distance I can shoot increases substantially if I don't cum for a couple of days. I've always wondered what my load would be like after a week, but I've only ever made if 4 days. I can blow two pretty big loads in one day, but the third is much smaller and the fourth is very little.