Doesn't cover it all, but here are two guns:
1) 11.5" With surefire closed tine. A burst at full speed, then same slowed down, then slowed down some more.
2) 16" With muzzle brake. Same sequence as above.
https://youtu.be/OVDuvYcnH8E?si=EnmghZLJh6gZ7ySs
Ammo was the same 55gr with H335.
It was a very dark night with virtually no moonlight.