I have been huntin squirrels for over 50 years now, and still do. Have to hunt'em by myself though, as the boys are grown and gone, and not many around here hunt them anymore. I feel like a dinosaur. Just found the thread, and haven't had time to read it all. I hunt with a Model 92 Winchester clone, in 357 mag. Have been casting and reloading for over 30 years now, and shoot cast bullet with an extremely light charge in a 38 special case. It won't shoot very far at all ( not near as far as a 22 short), and is not very loud, but it drills a nice neat hole in a squirrel's head.
Haven't had time to read all the posts here but, heard mention of a annual squirrel but, didn't catch were. I live in North Central Texas, down by Sherman.