The Gamo .177 with pointed hallow points will fire through a deer skull at 45 yards. and at 50 I can take cloths pins off a line. I think a head shot will stop a squirrel with ease. and I really don't think it would survive a chest shot.
i got mine to take out feral cats.
I do agree a .22cal would have more punch. I got mine at bass pro. they have a nice selection of air riffles and you can pic them up and hold them ... i got the Wisper because of the scope and stock it had. had the best fill for my long arms and the scope was NICE...
When I die bury me upside down so the whole world can kiss my ass.
"My mind jumped off the high dive into the deep end of the gutter and took scuba gear with it" Me.