What reside will leave the patch blue? Im using Tetra to clean my guns and I have a used .243 I'm trying to get clean and end up having a blue colored patch and not sure if this is copper or what. any thoughts? Seems Ive read somewhere in the past something about this. Tetra really has a strong smell of ammonia. I dont get the color when I use #10 or Shooters choice.
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Last edited by TnTom; 11-24-2010 at 10:03 PM.