The color does come off in the tumbler, that is fine with me. Not only do the marks help me to tell my brass from others, it also shows me which load is which if there is more than one. If I am trying different loads, there is a card with the ammo to remind me what they are. After cleaning I just add new marks for the next load.
I have a question about the punch marks because I dont know. Is there any danger of case failure or gun damage due to the punch mark? I guess not because of the people that already use that method. Just a question.
Allen
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