Reply To: Velocity
If you look at the drag profile of a pellet vs the speed in Mach you’ll see that the drag vastly increases when approaching Mach 1. When Mach 1 is passed the drag becomes pretty linear again. The fast changing drag combined with crossing the sound barrier destabilizes the pellet which leads to inaccuracy.
(the picture above is a G1 drag profile, not exactly the pellet drag but the shape is similar)
As stated above, if you shoot a pellet above the speed of sound which such speed that it stays there for at least the first 100 meters it’ll probably be stable (if twist rate, weight etc, are properly tuned)