I don't believe it will work that well. I had a 7mm Rem Mag that copper fouled like crazy. I tried all sorts of moly barrel treatments and projectile coatings to no avail. It was very accurate, but the copper was terrible. I have used David Tubbs Final Finish bore polishing system with good results.
https://www.trademe.co.nz/a/marketpl...ing/4021008442
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