The .40 was developed after tests by the FBI and others to find the best overall cartridge for law enforcement. I think most members here will say: the 45 has more knockdown power, but shot placement is "king."

Most law enforcement now days go with the 40 over the 45 because:

1) The knockdown power is sufficient (better than the 38/9mm) and recoil is lighter so the "average cop" has a better chance of hitting what he/she points at and making it count.

2) You get more rounds for the same loaded weight gun - again more shots without reloading means there is a better chance of getting a hit in a vital area.

3) The 40 and 45 minimize the over penetration problem of the 9mm.

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6/23/2022