You do not shoot the .40super in a .40S&W handgun. It is a necked down .45 case to hold the .40S&W bullet. You have to have a .45 handgun fixed with heavier springs and maybe some other work to be able to shoot the .40super.

There is also the....

.400corbon http://mysite.elixirlabs.com/index.p...2665&page=1597

.45super http://www.acecustom45.com/45super.htm

And others. There are even two "super" mouse gun rounds now,

The .25NAA http://www.naaminis.com/25NAArel.html and

The .32NAA http://www.naaminis.com/32NAA.html

Some great ballistics on all these rounds, just make sure you shoot it in the right gun with the right work done on it.