Newlon die blank questions

[glider]

So far I have tried with Wilson to make full length sizing die and wilson seating die from a reamer which has a 260 rem blown out to a 30* shoulder and .295 nk .Wilson does not accept reamers to work with .
So I am looking at Newlon blanks which come with pilot hole for reamer . where does sizing come from ? do these blanks after being cut need heat treatment and assume +/ - .002 shrinkage ? or do I need a reamer made smaller than finish reamer?
Also does anyone know of a smith who does this?
Thanks

post edited trying for wilson style seater

 

[rhovee]

A sizing reamer is used to cut the chamber. Different then the reamer used to cut your chamber. It is smaller.

 

[Dusty Stevens]

Resizing reamer or whidden can make them from fired cases

 

[Judd]

Use and old shot up straight contour barrel for your sizing die and buy a Wilson seating top for it. You can use your chamber reamer for this.

Sizing dies the guys above have you nailed. Also, read the heat treat post on this page from the last couple days...lost of info on how to get it treated/options after you've reamed the sizing die.