I bought some low priced (Federal and MagTech) 7.62x51 NATO ammunition, and I noticed the bullets are magnetic. Different descriptions around the web say they are either gilded or bi-metal. I am guessing they both mean copper plated metal.
Are these the same as Wolf and Tula bullets, or are they safer for a stainless barrel?
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Will bi-metal or gilded bullets damage a stainless barrel?