Ammo is key. I fell for .41AE years ago. Guess where that got me?
Yes you need a gun that is originally chambered to use 40 S&W since they have the same case diameter...
Get a .400 Cor-Bon. All you would need is a new barrel in a standard .45 1911.
It's a .45ACP necked down to .40 ... yes, factory ammo will be essentially impossible to find, but if you want to do something different ...
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I think what you meant to say was... "Just get a .45 Super"
No barrel change!! Just new brass, stronger spring and frame buff.
I am going .45 Super for my soon to arrive Glock 21SF and can hardly wait; it is a 10mm equivalent or exceeds it.
You don't need a 40 cal gun to begin with, it just makes the conversion easier. By adjusting ejectors, springs and extractors you can get the old 1911 to feed and shoot damn near anything. You will need 40 cal mags though. - dan
That sounds cool. I was idly contemplating a Glock 21SF, myself ... .45 Super sounds like it would be good in a steel 1911 ... is it wise to use such a thing in a Glock-made plastic handgrenade?



























