What is the Difference Between Subsonic and Supersonic?

The main difference between subsonic and supersonic ammunition lies in their muzzle velocities, which are influenced by factors such as atmospheric conditions, barrel length, and variations in ammo manufacturing.

• Subsonic ammo: If a bullet's muzzle velocity is lower than 1,125 fps (feet per second), it is considered subsonic. Subsonic ammunition travels slower than the speed of sound, typically around 1,000 to 1,100 fps. This type of ammo is often used for suppressed firearms, as it reduces the noise generated when the bullet breaks the sound barrier. However, subsonic ammunition may have less effective range and terminal ballistics compared to supersonic ammunition.
• Supersonic ammo: When a bullet's muzzle velocity is 1,125 fps or higher, it is considered supersonic. Supersonic ammunition travels faster than the speed of sound, producing a cracking sound when it breaks the sound barrier. This type of ammo is more common and is often used for long-range hunting or target shooting due to its increased muzzle velocity and terminal ballistics.

In summary, subsonic ammunition travels slower than the speed of sound, while supersonic ammunition travels faster than the speed of sound. Subsonic ammo is typically quieter and less effective at long ranges, while supersonic ammo is louder and has a longer effective range.

Comparative Table: Subsonic vs Supersonic

Here is a table comparing the differences between subsonic and supersonic:

The main difference between subsonic and supersonic lies in their speeds in relation to the speed of sound. Subsonic objects travel slower than the speed of sound, while supersonic objects travel faster than the speed of sound. This speed difference results in distinct sound properties: subsonic objects do not break the sound barrier and do not produce a supersonic crack, while supersonic objects do break the sound barrier, producing a cracking sound.