I have an older set of Lyman dies that work fine for bullets up to .429 size.With the .430 the neck tension is a little much.I am aware of the varying neck thickness of brass Starline + Win .007 and Rem .008-.009 I had the sizer die apart and it doesn't appear to have an expander button? Odd but parts may not be available for this model.May need another die with a .44 mag .430 button? The bore size is .4286 in my Win 92 so I want to use .430 bullets if possible.Thoughts?