Well, they are not all the same.
I have owned 4 different hand pumps from 1999 to today, each pumped a different amount of air and each felt different using. I also tried just 1 Benjamin pump, BEAR to use compared to Hill of FX. I now have a ( and I just have it to show new folks how easy pumping is ) a $100.00 that I believe is now the G6 ( ??? ) easiest pumping of them all, seems to pump at least as much per stroke as FX.
I started shooting pre-charged before there were hand pumps and have NEVER seen a true comparison between pumps, guess they just aren't that fun no matter what. "wann use my hand pump collection?" . And now with low dollar boosters and compressors hitting the market so fast I don't see anyone steping up to do a review.
John