Ballisticians have known for hundreds of years the need to stabilize projectiles for best trajectory, without any knowledge of a sound barrier. A .22 cal. 35 grain rimfire standard velocity is stable at its designed velocities and ranges. A .22 cal. 55 grain boat tail round from a 22.250 needs totally different velocities, rate of twists, barrel lengths, powder type for burn rates etc. to perform at its anticipated ranges and velocities. All bullets eventuallly destabilize and fall to earth, it is just a matter of how soon. The