Pump is fine (will operate effeciently) at 50 psi but not rated at 40 psi

[Boyblue]

My first choice
2ST52-12PLUS-P4 MYERS Predator
is not rated at 40psi (my cut in pressure) for my well depth of 20ft. is this a problem? Should I go with my second choice?
S10P4JP05221 sta-rite JP Series
which is not stainless steel and is a brand (Sta-rite) that is not carried by any of the local companies?

For a hundred bucks more I can get one of these two:
50C21112G8 RED JACKET GRIZZLY (Not Stainless Steel)
10JV05S4-2W230 Franklin J-Class Series V (Stainless Steel)

 

[Valveman]

That pump will work fine from 40 to 60 PSI. Look at the pump curve, not a chart.

 

[Sponsor]

 

[Boyblue]

That pump will work fine from 40 to 60 PSI. Look at the pump curve, not a chart.

Yea, I got the same advice from the CSV live chat. I understand now. I checked the THD at my cut in and cut out pressure and everything was good but for some odd reason I looked at the chart and got confused.