I have a gamo big cat .177 pellet gun. They can be loud too when using the high performace round and they will break the sound barrier. As stated in a pervoius post there is the whisper version. I would go with the .22 wispher version for max killing power.
Or as stated you can get a .22 bolt action and use sub sonic/short rounds. Very quiet and if you have need to use regular .22 ammo you can.
Or as stated you can get a .22 bolt action and use sub sonic/short rounds. Very quiet and if you have need to use regular .22 ammo you can.