40 S&W vs. 357 SIG vs. 9MM vs. 45 ACP (Part 3) (FMJ Polycarbonate Test)

Penetration test between the 40 S&W, 357 SIG, 9MM, and 45 ACP. Firearms used: M&P 40 Pro series. “ barrel M&P 357 “ barrel M&P 9 “ barrel M&P 45 midsize 4“ barrel Ammo used: .40) WWB 180gr fmj 357) WWB 125gr fmj 9mm) WWB 115gr fmj .45) WWB 230gr fmj