In weapons firing supersonic ammunition, the bullet alone produces a loud and really sharp sound as it leaves the muzzle in excess of your velocity of sound and slowly decreasing pace as it travels downrange. It is a small sonic growth, and is also referred to from the firearm subject https://hunting-suppliers-uk16193.blogkoo.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-sound-moderator-51973323