Not what you want but heres 2c worth anyways
I have used bushing dies in a few calibers, Wilson ones, Whidden ones, Forster ones ( they are a pain as they are different than evreyone elses ) In line styles and Redding. They all do a good job, but you do get that little donut at the base of the neck, not really a drama if you load long bullets anyways.
All this has been on hunting style rifles and the accuracy has been teriffic, definitely sub MOA and usually 1/2 that.
I tried the Lee mandrel idea in a .260 and hated it so went back to bushing dies, I have tried the Lee style again now in 308 and it seems to be fine, 1/2 MOA out to 600 yds if I do my bit. Time will tell but for now I like them.
I think the secret ( for me anyways ) is to leave it set up in the press and never ever move it, unless of course if you start using brass of different wall thickness
Upgrading to a turret press has helped with not having to change shit out.
I would rate the Whidden above the others, as their micrometer seater is very nice to use.
The Wilson Sizing die is a nice bushing die too but I dont think they do a seater to match it ( look at BRT shooting in Au they sell the Wilson for about $110 AU I havent seen anyone in NZ selling them yet.
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