I have used my 15-22 for squirrels and love it. I put a red dot scope on it and can easily kill squirrels at 50 yards. Have killed a bunch of groundhogs and some fox with it also. I tested a bunch of ammo and they all worked well but use Mini Mags for ground hogs. When squirrel hunting I normally get to within 25 yards easily but have killed them out to 50 yards.