#SUBSONIC SPEED FPS FOR 300 BLACKOUT FREE#
#SUBSONIC SPEED FPS FOR 300 BLACKOUT CRACK#

But then, Id rather have a 9mm (124 JHPs at 1650 fps. Performance of 300 Blackout Subsonic meets or exceeds FBI Protocol terminal ballistic test requirements. 300 AAC loads fire a light 90-125 grain bullet at a muzzle velocity of 2,200-2,600 feet per second.

#SUBSONIC SPEED FPS FOR 300 BLACKOUT FREE#

Someone else feel free to correct me if I'm wrong, but 1240 fps should keep you supersonic out to around 100 yards. Hornady® Subsonic Ammunition designed for accuracy and performance below the speed of sound now comes in both rifle and handgun loads. If you look at the basic temperature and don't factor in humidity, altitude, or any other variables, you're looking at a difference in sound speeds like this:Īny colder than that and this Kentucky boy thinks you're crazy for practicing rimfire shooting.įor 'sane' or 'normal' (like any of us fit those criteria) shooting conditions, 1050 fps will keep you subsonic. This can cause a normally supersonic bullet to travel at subsonic speeds, getting rid of the destabilization that comes from the supersonic-subsonic transition. If there is more humidity, the speed of sound increases. Therefore, if the speed of sound is lower than 'normal,' a subsonic bullet will become supersonic if it's moving faster than sound. If it's cold, the speed of sound is decreased. The speed that sound travels gets slower as air gets more dense. The air gets less dense as the humidity rises. To be subsonic, muzzle velocity limit is just over 1000 feet per second (fps). With bullet weights in the 190-220 grain range, and a muzzle velocity below 1,100 FPS, 300 Blackout is one of the best. 44 Mag gets the win with the parameters OP set up.

As stated above, the advantage of 300BLK is getting 30 rounds into a mil spec AR15 magazine, using an AR bolt, a 9 inch barrel, and firing.

Subsonic 300 Blackout has some of the best terminal ballistics of any subsonic round. FMJ, or Soft point will be almost useless in either caliber at subsonic velocities. The average velocity was 1,069 fps, but the loads extreme spread of 96 fps. All the major ammunition manufacturers offer subsonic. 300 AAC Blackout would not cycle an AR action as is implied in this article.

#SUBSONIC SPEED FPS FOR 300 BLACKOUT CRACK#

The air gets more dense as the temperature goes down. When shooting your 300 blackout suppressed you'll likely want to use subsonic ammo to make the gun quieter. Theoretically, supersonic 300 Blackout has the ability to make it a threat. In simple terms, subsonic means the bullet is moving slower than the speed of sound, while supersonic means the projectile breaks the sound barrier, producing a sonic crack as it travels through the air.

Subsonic speed fps for 300 blackout