Is a .25 cal spring air rifle asking to much for a spring rifle?

Should I get a .25 cal spring air gun for general small game hunting (birds, squirrels, coons, ect) and pest control? Is this asking too much for a spring gun? Should I get a PCP gun in staid? .25 is much bigger than .22 and .177 so would a spring .25 be inefficient in terms of performance?
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