Originally Posted by
statjunk
Wow what a great post. Learned something today.
So question. Speed of sound is around 760 mph. Converted to fps that would yield approx. 1,114 fps.
So can we say that the max accuracy range of a projectile is when it's speed drops below 1,110fps roughly?
Tom
Well thats the big contraversy. I would say its when any part of the bullet causes supersonic wave. So as BB showed, it be lower than that transonic. But a good rough rule of thumb is at least 1110fps. That number changes greatly with Altitude and temp, and humidy also. Supersonic numbers go down with altitude but drag also goes down dow TOF goes down. Also the TOF goes up with lower temperature.