Which Caliber for 100-125yd Ground Squirrel Kills? .22 or .25?

I stated in the post picture, I need the elevated position of my living room window to see them in the grass and the angle gets more body exposed. I also stated I need to keep this low profile operation. It's basically ground squirrel sniper black ops over here! lol
Thanks i was not thinking about that .
 
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