I'm getting closer to actually loading some ammo. Scrounged a lot of brass this weekend. Among the .45 casings are two or three Federals which are in good condition but have a silvery appearance rather than brass. I checked and they're not magnetic, so they can't be steel--but what are they? Nickel alloy, maybe? More importantly, are they safe to reload or should I chuck 'em out? Thanks.
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