Did I say size of the hole? The injury caused by above the speed of sound projectiles is easily distinguished from subsonic. All but one GSW among the nine dead were NOT handgun wounds.
Okay. For the benefit of others reading this, the damage to tissue surrounding the permanent wound cavity is much greater in the case of a supersonic bullet than that caused by a subsonic round. Tissue deformation/damage in the instance of a supersonic round can produce a temporary wound cavity up to 10X the diameter of the projectile, where the tissue damage in the wound track of a subsonic round tends to approximate the terminal diameter of the projectile (allowing for deformation).
That tissue surrounding the permanent wound channel will have been subject to shearing forces and pressure waves, rupturing blood vessels and bursting cells, causing swelling in the tissue giving what hunters know as a 'bloodshot appearance'.
The difference in entry wound diameter and permanent wound cavity vs the gross diameter of that track of damaged tissue would indicate the energy of the projectile.
I believe that is the determinant to which you are referring, and it should be referenced in the ME's report, even without ballistics.