The Avenger's a little better than that. When filled to 4,200-4,300 I can get about 80-90 shots, with the power setttings I use that would take a little less than 200 pumps. But I rarely (once) shoot that many before re-filling. Usually shoot 30-40 then it takes 85 or less. Equals out to about 2 to slightly more pumps per shot. I only target shoot so regulator and hammer spring are set fairly low, pushing up the power would use much more air. The Beeman Chief also takes about 2 pumps per shot.Yep, it's about 100 pumps to get 2000 psi. For roughly 20 shots of .22 - grandkids, neices are handy.