9mm vs 40 S&W ballistic gel: Head to Head!
This ballistic gel test compares 9mm +P and .40 S&W HST ammunition. The .40 S&W demonstrated more dramatic expansion, while the 9mm +P achieved greater penetration. The host notes that .40 S&W offers superior terminal ballistics, but 9mm provides advantages in capacity and recoil management, especially in compact firearms.









