I am looking for a low FPE gun incan use for 35 yards and under in a backyard and in barns for pesting. For those instances I do get a past through on small pests and birds I don't want it blowing holes through stuff. Should I be looking at a .22 or a .177? Price range best bang for buck a friend reccomended the pp750 and I like the price range but would like to know what my options are. Any input would be greatly appreciated.