Atic- please post over in the handgun section. You are usurping someone else's thread. (have waited all week to use that word)
CCI makes good ammo- reliable, accurate, consistent. Folks were squirrel hunting with 22's a LONG time before the super-duper golly gee .22 Macerator Magnum Cobra Death Nuclear BioHazard ammo was ever thought of.
For a body shot, find a good .22 Hollow point. Does NOT have to be a Stinger, Viper, or Yellow Jacket. However, IMHO, you damage a lot of meat with a body shot on a squirrel (and I mainly shoot them for the skillet). A head shot with any 22 ends the discussion with the squirrel.
Of course, to prevent damage to the fur, I always shoot them thru the eye. Have to make sure I have the proper angle so bullet passes out of the other eye.