If you have a low recovery rate, like 1 or so gpm, that doesn't mean that that's all the water you can use. If you have a 6" well, there is 1.47 gal per foot of water in the well. I.E. 100' of water above the inlet to the pump says 147 gals in storage, plus the recovery rate gallons.
What is your static water level, recovery rate, well depth, pump depth and the diameter of the well?