rjquillin wrote:So, which is quieter, the Bone or the Cat? I got sensitive neighbors here.
Having never even seen any of the rifles that were in the sale, the following comes from watching a lot of videos on youtube.com about Gamo rifles, and a general knowledge of firearms and physics.
When you ask which is quieter, you have to include the sound made by the projectile. Any projectile with a muzzle velocity over the speed of sound is going to generate its own racket, and the muzzle brake isn't going to make any difference. The Bone uses a gas spring, while the Cat uses a wire spring. The Bone will likely generate a higher muzzle velocity and more pressure at the muzzle than the Cat, and this probably means that the Cat will have the edge, however small. The 52% in sound reduction likely doesn't mean it will sound half as loud to you, since you perceive sound on a dB scale, and they probably measured it on a linear scale.
If you want to minimize the sound of the projectile in flight, shoot the one with the slowest muzzle velocity, which is also the heaviest one, and that is probably the round ball.
There is a video on youtube.com (actually more of a sound file) that compares the sound of various shots from different positions from the shooter, using a couple different guns. I don't know how scientific it is, but it's interesting.
The .22 rifles will probably be quieter since they are lower velocity than the .177, because the slugs are heavier.
In short, don't expect miracles.