Yes - provided that it is made well, of good materials, and properly fitted/sprung.
L.A.R. used to make the "Grizzly," which was a "stretched" 1911 originally made for the .45 Winchester Magnum cartridge, and later for the .50 Action Express. Since they had to make the frame larger to accomodate the longer cartridges, I think they went ahead and beefed everything up somewhat - so it's not really a "true 1911." Barrel lengths were 5.4" and 6.5". I believe the company went out of business in 1999 or 2000.
If you want to soup up a standard 1911, Clark Custom Guns offers kits to convert your 1911 to the .460 Rowland caliber, which is basically a magnum-class .45ACP - the case is thicker and a little bit longer, but the loaded cartridge is still short enough to feed from standard 1911 mags. Ballistic performance is supposed to meet or slightly exceed .44Mag, depending on the load. The conversion kits consist of a compensated barrel chambered for the Rowland cartridge, plus a super-heavy recoil spring to keep the gun from beating itself to death. The compensator is needed, for both recoil control and to help keep the barrel locked to the slide long enough for the chamber pressure to drop to a safe level. However, the .460 Rowland is not for all 1911's - Clark's does not recommend that you install the conversion on anything but a Colt, Kimber or Springfield, lest you batter or crack a lesser-quality frame. I can't see how a well-made Les Baer, Wilson or Caspian frame wouldn't stand the gaff, but you definitely don't want to try converting a Llama, a Sistema, or a Rock Island/Charles Daly.
