.45 ACP vs 9mm: "Stopping Power" Analysis

Colt 1911 .45 ACP vs Glock-19 9mm stopping power analysis. Impact force, impact pressure, drop, and ballistic power.

[@MrT-hk9wn]

You gave the 9mm the win for impact force but your numbers above do not.

[@markscythian7179]

Computing the 'Ballistic Power' of the 9mm 116g round (Joules Kinetic Energy per second = Watts), makes the 9mm round's Impact Pressure greater than the .45 ACP's, despite having less Impact Force. The .45 ACP has greater Impact Force, but less Impact Pressure as its diameter/caliber is greater than the 9mm. Pressure = Force / Area. Circular Area = Pi x radius^2. Less Area = More Pressure. Projectile Stopping Power is probably defined by: 1.) Impact Pressure. 2.) Smaller caliber/diameter fragmentation, and shock-wave propagation.