I bought a brick of 22 LR Aguila Super Colibri by mistake when 22 ammo was hard to find. The only weapon I have shot it in is my Rurger Single Six Convertible with a 4 3/4 inch barrel. It is very accurate at short ranges and very quiet. You don't need ear protection as it is not much louder than my old 22 caliber Benjamin Franklin Air Pump Gun which I scare squirrels in my front yard with. Haven't had the nerve to shoot the 22 revolver in my yard yet. The only bad thing is that my grandsons snicker and giggle when I shoot the Colibri with them at the range! They are used to a much louder bang when shooting.