Quoted:
Is a Bull barrel better than a regular(factory) one?
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Not really. A bull barrel is a little easier to fit to the slide for a match-grade fit, but the same can be accomplished with a bushing and standard-weight barrel.
The slide and frame fit will be shot long before you could shoot out a barrel. The service life of a .45 in the military was 5-6,000 rounds, during that period the barrel would never be replaced unless there was some kind of damage or flaw. Shooting the pistol would not damage the barrel however. Modern 1911s from reputable manufacturers would last many more rounds than that. My Kimber had about 9,000 rounds through it before it was stolen, nothing but holster wear on the finish and polishing (and I do mean polishing) to the moving parts of the pistol. Was more accurate than when I got it.
"Do what you will,
just don't think the tank of handguns can be destroyed through usage."