A lot of people use the bushing insert nose sizing dies to good effect, but I had my gripes for several reasons. First, the bushings have an abrupt angle that can raise a ring or scrape lead, the nose tends to get bent with relation to the body in the compound-linkage 450/4500 machines, and there is no feature to ensure the nose and body get sized in a concentric fashion. Maybe this matters for the kind of shooting you do and accuracy you expect, maybe it doesn't.
My solution was to ream an H-die to have two diameters plus tapered transitions at the entrance and between the nose and body diameters inside the die. While this works best with powder coated bullets, it works fairly well with regular bullets too if you roll them on a case lubing pad and don't try to size the body down more than .001".
I can make you one to your specifications if you like but it is not inexpensive for me to do so as it would be best (for uncoated bullets) to make it out of 4000-series steel and heat treat both the die and ejector before final polishing.
