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muzzle brake causing innacuracy

  1. O

    Gunsmithing Muzzle brake ruins muzzle crown

    I'll try to make this short. I added a clamp-on muzzle brake to my RRA heavy bbl varmint gun. Before muzzle brake, rifle shot consistent 1/2 MOA groups. I noticed a gradual reduction in accuracy over the next 500 rounds to where I thought my bbl was wearing out. Bbl cleanliness good through life...
    • Old Fart 2
    • Thread
    • gas cutting at crown muzzle brake causing innacuracy
    • Replies: 12
    • Forum: The Armory
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