The main reason to rejecting it is actually pretty pathetic, it was because "concluded that its recoil was excessive in terms of training for average agent/police officer competency of use and qualification," and the pistols that chambered it were too large for some small-handed individuals. :gunWhat's the story of 10mm,well i have read it has got greater recoil as compared to .45ACP .Was this the main reason for FBI inspectors rejecting it?
Many still prefer the 10mm and refer to the .40S&W which the FBI decided to adopt as the "short and weak"
It really gets down to two choices when it comes to pistol ammo
9mm, .22, .40=Weaker and less range, however if with this ammo you can carry a larger magazine load, which believe or not is a big issue
.45, .357, .50 AE= More powerful, higher velocity, however more heavier and smaller magazine capacity
It really evens it self out. Look at is this way: Weaker round and you have more bullets in the magazines to spit out, Powerful round less ammo to pump out, but you can really on the pure power to bring down a individual.
However this is hope, and you can be like me and continue to love my baby the .41 Action Express