Does A Heckler & Koch MP5SD Turn 9mm Into 380ACP Ballistically? Let's Find Out!
This video debunks the myth that a suppressed Heckler & Koch MP5SD firing 9mm ammunition is ballistically equivalent to 380 ACP. Chronograph data and ballistic gel tests demonstrate that 9mm, even when made subsonic by the MP5SD's integral suppressor and ported barrel, retains significantly more energy and penetration than 380 ACP. The presenter emphasizes that while velocity is reduced, the heavier 9mm projectile and its construction allow for effective terminal performance comparable to supersonic 9mm.













