Forster custom honed FL sizer with a mandrel and Forster micrometer seater gave me a slight improvement on paper (like .1-.2) and the chrono over my Redding bushing and micro seater. I used an expander that barely touched as it came through the neck and also tried no expander at all. Whidden FL, with the expander set high, and micro seater were better too. I settled on the Forster and sold the R's. The W's are my backup set.
The speed I lost with the mandrel setup was made up with not having to fumble with bushings when I switched brass. Setting NT from the inside with no outside interference seems to be more consistent; judging from bullet seat feel and the slight improvement in accuracy, SD's and ES's. But, I know plenty of shooters getting results just as good from bushing dies and NS only and they think I'm doing it all wrong and overworking my brass. Really depends on which way you like to do it. I do anneal but I don't worry about overworking necks anymore as I've never had a split neck be the reason for retiring brass. I do not try to get 25 reloads from one piece of brass either. It's a relatively cheap part of this whole equation. Only my .03...