My theory in shooting is that I like to shoot, not pump. My main gun gives me 30 shots for 100 strokes of the pump. 3 plus shots per fill. With a tough of Muscular Dystrophy, it isn't easy to pump, but I'll do it if I have to.
So, I will pump, sometimes. I have a tank and get it filled at the local paintball shop, but still pump sometimes.
My main gun is a Marauder. No regulator. I use the tank on that gun as much as possible. Pumping it just takes all the fun out of shooting, especially when doing chrony work.
Secondary gun is a Crosman 1701P, and I usually pump that gun. 30 strokes = 60 shots. Small resevior on the gun, low power, good gun for pumping.
It's all in how you look at it.