Well; yes, and no Jack. Certainly not as attractive or precise looking, but if done correctly,and there are no burrs or nicks, one would never know the difference in the shooting.
Ross Seyfried scribbled an article long ago pertaining to the poor boys method of cleaning up a muzzle. He used a long spitzer bullet of same caliber, chucked it up in an electric drill, smeared some Clover compound on it, and touched up the bore.
That bullet coming down the bore, doesn't know the difference from a custom C-note crown job, or a bullet spun in the bore with Clover compound, as long as the bore is free of any microscopic burrs or dings.
I like a nice, clean,precise looking crown job as well as the next gun nut, but there are other ways to skin a cat, if a guy is operating on the cheap.