wrote:

...the 9mm automatic makes more sense as the clip can be quickly changed
to match the situation.

If I read you correctly, you feel that you are now prepared to counter
the decisions of law enforcement, weapons, and ballistics experts, as
well as aeronautical engineers? You may want to familiarize yourself
with the design and operation of the typical semi-automatic pistol
before you say any more.

There is nothing about the choice of calibers, whether 9mm, .40, or .45
that affects the ability to change magazines rapidly. The operation of
the pistol is virtually identical in what ever calibers it may be
offered. Cartridge size and the practical limits of grip size determine
the number of rounds which may be carried, but unless one is an advocate
of the "spray and pray" method, shot placement and terminal effects are
far more important than the number of rounds available.


Jack