Debatable...Good read. Another thing. If the weapon's barrel is designed to shoot 38/357, the bullets will tumble shooting 9mm/380. See 38/357 is .357. 9mm/380 is .355 dia.
From Shooting Times:
The bottom line from slugging 9mm pistol and .38/.357 revolver barrels is that there was no difference in groove diameter other than the slightly undersize Colts.


