Regardless of other factors, if the bullet cracks the sound barrier, it's going to be loud.
You can even take very quiet, subsonic .22s that work near silently, but if you take them to a high enough altitude, they can start hitting the sound barrier due to lower air density.
Regardless of other factors, if the bullet cracks the sound barrier, it's going to be loud.
You can even take very quiet, subsonic .22s that work near silently, but if you take them to a high enough altitude, they can start hitting the sound barrier due to lower air density.
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