[marktwain]

Correct. But, as you pointed out 1050 fps to 1085 fps is considered subsonic for .22 projectiles.

In my experience, you do not get the supersonic "crack" in that velocity region.

You might get it in temperatures below freezing

There is a difference between having instability and producing the sonic crack.

[marktwain]

A bullet never goes from supersonic directly to subsonic, it always slows from supersonic first to transonic and then to subsonic.

It has to achieve supersonic before it can slow to subsonic.

If it never reaches supersonic, it never has to slow to go subsonic. It is already there.