I'll agree with that, too. Snap shooting is a way to re-establish dominance, not maintain it. Get him in, then post on him and don't let him play anymore paintball. Personally, I don't hose on a bunker with no one sticking out of it, just a shot every few seconds until he thinks he can start playing again, when I shoot him.
Stay on someone you've tucked in, AIM, and eliminate them. Simple.