I have a squirrel problem and the airguns I have are pretty slow pistols. The highest velocity I have are with a Crosman 1377 with 600 fps and a 1322 with 460 fps. I was an active hunter with PB in my youth but have never tried to use an airgun. I searched the forum and found a lot of threads about squirrels and power but none I read really answered my simple question. Given a close range of less than 20 yards, will a faster .177 pellet be more lethal than a slower .22 pellet, or visa-versa? Or is either one too under powered?