https://www.pyramydair.com/blog/2019...reak-part-2-2/

You do the math.

Basically, with most regular 12ish ft-lbs pumpers, the major pump strokes once you get past the first 3 or 4 are each the rough equivalent work of cocking a fairly powerful springer. Even a typical Beeman R1 takes about 40 ft-lbs.