Walter is right. The external dimensions are the same. The brass is beefier to handle the higher pressure.
One that I plan to try out in the near future is a 1911 that can handle 45 SUPER 200gr at 400 fps that only needs a 17 1/2 pound recoil spring and is supposed to be reliable and relatively soft shooting. I wouldn't shooting any SUPER loads through a standard barrel with a spring any lighter than 28 pounds, preferably higher. John Adkins makes them on your own gun and I want to check out a couple that he already has as soon as I get the chance. Will post results here. It should be interesting if knowthing else.
The 45 SUPER makes the 1911 extremely versitile. I think it would be very useful for hunting medium sized game and for defense. It brings the ACP up to a level that makes it humane for hunting whitetail. That's one of the big reasons that I'm considering one too.
robert
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"But now, he that hath a purse, let him take it, and likewise his scrip; and he that hath no sword, let him sell his garment, and buy one." -Jesus Christ (Luke 22:36, see John 3:15-18)
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"Reasonable gun law?............There's No such critter!" --EQ
[This message has been edited by EQUALIZER (edited April 12, 2000).]