The Firing Line Forums - View Single Post - Subsonic Ammo vs. hyper-velocity

Scooter2 · January 28, 2001, 05:38 PM

Hyper velocity can be more inaccurate than subsonic rounds. Just look at the ammo used for Olympic rimfire competition, all subsonic. The idea is if you are firing at a target at x distance, you want to bullet to stay supersonic or subsonic all the way out. If it transistions from supersonic to subsonic, it can be destabilize. I've talk with high power rifle shooters that say the 308 is not ideal for 1000 yards competition because after about 800 yards, the bullet becomes subsonic and often hit the target sideways.

January 28, 2001, 05:38 PM	#3
Scooter2 Senior Member Join Date: January 16, 2001 Posts: 115	Hyper velocity can be more inaccurate than subsonic rounds. Just look at the ammo used for Olympic rimfire competition, all subsonic. The idea is if you are firing at a target at x distance, you want to bullet to stay supersonic or subsonic all the way out. If it transistions from supersonic to subsonic, it can be destabilize. I've talk with high power rifle shooters that say the 308 is not ideal for 1000 yards competition because after about 800 yards, the bullet becomes subsonic and often hit the target sideways.