THE BASIC PRINCIPLES OF 300-BLACKOUT-AMMO

I have usually read the 110gr was designed especially for the .300BLK and expands at A great deal decrease velocities. I feel the least velocity for growth to the 120gr is 1800fps.I do not have the identical problems with supersonic rounds. Positive, there remains to be carbon, but no specs of unburnt powder almost everywhere. I'm not positive why