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Message: <blockquote data-quote="KurtM" data-source="post: 4176450" data-attributes="member: 6064">Well, first off MOST steel case ammo has a steel jacket that is copper washed. (So does Winchester White box 308 and most military surplus ammo just FYI). It isn't the steel case they object to it is the sparking of steel on steel of bullet and backstop.Now granted it is a very soft steel jacket around 83 or so on the Rockwell B scale, where a gilded, or copper jacket is around 42 on the B scale. Also an FYI the steel jacketed stuff DOES wear your bore more than a copper jacket, and I would never shoot it in a Stainless barrel, but you can if you want. You will just need to replace the barrel sooner IF you shoot that kind of volume.</blockquote>