One answer would be pressure, which affects blast, reloading tolerances, and other things; another would be that some people prefer larger platforms due to hand size and shape, and similar recoil in a gun that does not fit as well may result in higher perceived recoil; another is that boring more metal out of a 9mm platform means some compact .40 designs push metallurgical limits closer than people may like.
Other people will come up with other reasons, I am sure.
Last edited by MLeake; January 29, 2013 at 08:15 AM.
Reason: than, not that.... another iDevice spelling issue.
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