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Alex,
Sorry for the delayed response. I am not sure of the processes involved in making those pins in the most effective manner. I found this website. http://www.allaboutpins.com/diestruck.html ...

I may be able to supply an answer or two as I am a die maker. I am not sure what you are trying to find out though. You say several different types of pins use a die to punch brass or copper to...