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m-77 barrel problems

  1. M-77, 1984, 7mm Rem Mag - Barrel Problems?

    Gunsmithing
    I'm new here, and maybe this has been answered. If so, sorry--please point me to the post. I searched and didn't find it. Also, I am NOT a gunsmith, but I'm looking for expert answers. My M-77 with Hornady Precision Hunter, 162 grain, on a sled, produced a 3 inch group at 100 yds, six inches...
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