While deer hunting from a stand, several years ago in Louisiana, I was practically attacked by a determined squirrel. He threw limbs and acorns down on me and then it got worse, so I switched out my 357 mags for some 38 wadcutters and took aim at the tree rat as he flattened against the trunk of the tree. He was my first squirrel kill with a 38, and it's true revenge is sweet; with onions and garlic and brown gravy. The wadcutter caught him at the shoulder and I only had 3 legs and no head to clean. I've used wadcutters for rabbits and armadillos before with excellent results to 30 yds.