I found this:
Forensic pathologists commonly describe bullets as small (.22, .25), medium (32, .38, 9mm) or large (.40, .45, .50).
This was from:
Practical Pathology of Gunshot Wounds
Note it said “commonly describe”
I have already posted that info to him. He is just trying to make a case that the cops could have used a .30 caliber sub-sonic M4 round to execute the bikers.
Good information EB...David Martinez, one of the Bandidos at the center of the melee was using a .32 Beretta.
I noticed this is primarily directed toward pistol calibers. They put .25 caliber in "small", while .32 through .38 caliber is considered "medium", .40 caliber and up is considered "large", but .30 caliber is in limbo.