SUBSONIC 9MM CRACK

Subsonic 9mm loads usually substitute heavier bullets - 147–150 grains - to reduce the muzzle velocity to approximately 1,000 ft/s to avoid causing additional noise. However, all of these velocities are considerably higher than standard pressure. The latter speed corresponds to the muzzle velocity of many standard-pressure 9×19mm Parabellum loads using 124-grain bullets. Increasing to 100☏, the speed of sound changes to 1,159 ft/s. At 32☏, this drops to 1,086 feet per second. For example, at 68° F, the speed of sound is approximately 1,125 feet per second. Likewise, the colder the temperature, the lower the speed of sound. The higher the temperature, the higher the speed of sound. It varies according to environmental factors, such as ambient temperature and barometric pressure. What constitutes subsonic ammunition depends on several factors. To optimize the functionality of a sound suppressor and render your firearm as quiet as possible, you should select ammunition that is reliably subsonic. Once the bullet leaves the suppressor and enters the air, the suppressor’s job is done. A suppressor can only moderate the sound of the gunshot at the muzzle by slowing and cooling the powder gases. If you own or are interested in owning a sound suppressor, the question “What’s subsonic ammo?” is an important one to answer. Many shooters use sound suppressors, also known as silencers, to reduce the risk to the shooter and bystanders. The sound of a gunshot can cause permanent hearing loss, even with infrequent exposure, and comprises several variables. When your priority is reducing the report of your firearm to a minimum, this requires the use of subsonic ammunition.

SUBSONIC 9MM CRACK

The sonic boom produced by a bullet can’t cause the same level of disruption and is more akin to the crack of a bullwhip - which also creates a sonic boom. You may be familiar with this phenomenon if you’ve ever witnessed a supersonic jet fly overhead and cause a sound similar to a thunderclap. Whether your ammunition is subsonic or supersonic is important because when a bullet breaks the sound barrier, it creates a miniature sonic boom. If, however, the bullet leaves the muzzle at a speed slower than the speed of sound, it’s subsonic. If the bullet exceeds the speed of sound, thereby breaking the sound barrier, it’s supersonic. When you ask, “What is subsonic ammo?” the answer is simple. These powder gases are the primary source of a firearm’s report (the sound of the gunshot.) When you fire a cartridge, the propellant charge burns, generating high-pressure expanding gases that drive the bullet through the barrel.