can i shoot 9mm through 38 special
No you cannot... - They are approximately the same caliber bullet .355 to .356 for 9mm and .357 for 38 Special so it is not the barrel/caliber limitation. - The 9mm is typically a rimless round whereas the 38 special is rimmed. However with moon clips or some type of clip you can shoot 9mm in a 38 Special Revolver.57, 38 special, and 9mm all have the same diameter on the bullet. But all the casings are different. Ruger makes a revolver that you can interchange to shoot all 3.