I would like to make a forming die for brass shotshells, from a 1-1/2-12 bolt. This die will reduce .0650" OD shells to .614".
What grade of bolt is best for abrasion resistance? Is it even a factor to consider? I do not want it to embed particles and scratch subsequent cases.
Is it even a factor in what I am trying to do.
I know a grade eight is stronger in at least tensile strength, does it still give the best performance for my intended use?