The main advantages of using a bushing die is that you can just size down the neck to give you the bullet tension you want thereby negating the need for using an expander on the decapping shaft. You're working the brass less by not oversizing the neck and then dragging the expander back through. Most run-out problems can be attributed to the expander.
All my reloading is done with Redding FL or neck bushing dies (and Redding body dies). Prefer Wilson bushings to Redding. Expensive dies but worth it IMHO.
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