If you cannot bump the shoulder back .002", you need to either try a convention press that uses shellholders, or trim the bottom of your resize die. That's why I always mate a shellholder to the sizing die. It should bottom out on the die and prevent from bumping the shoulder too much. Different brands of shellholders can be thinner or thicker, the nominal depth should be .125". It may be necessary to mate a thin shellholder to your particular die to get the correct bump. I have a few dies that were over .020" short, and I welded 3 small spots on top of the shellholder and ground them to the correct height to get no more than .002" shoulder bump when it bottomed out.
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