I am guessing then off 800 fps you are shooting in the 20 FPE range. Under 50 yards you should be pretty good for squirrels. The Uragan Compact in 22 can go to 30 FPE if adjusted right. The RTI PPC is 35-40 FPE, if you push it.
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For long distance shots (above 100 yards) in. 22 Cal you need, at least, 35 foot pounds.