What Dave said but here's what I do when using my 3 jaw chuck. I chuck up a piece of stock long enough to support the stock. In your case .75 long should be plenty. I usually allow about .125 wall after boring. Now put a register scratch on the stock that lines up with the center of your number 1 jaw. Bore it to size, remove and cut open with a bandsaw. The cut will be 30 degrees away from your mark. Deburr. Now when you put the stock back in the chuck it should run dead true, well I guess on how good your chuck is. Generally a chuck will repeat for a given diameter so by removing the bushing and putting it back in the same spot it should be pretty accurate. I have a whole box full of split bushings for just those occasions. Make sure you scratch the size of the bore on the bushing for future reference.
You can even reused the bushing for a larger size in the future. Just shim the saw cut, clamp in the same place in the 3 jaw chuck, rebore, remove shims, chuck your material and turn it.
gbritnell