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  1. M

    7mm twist

    I want to purchase a 26 in bbl for a rifle build. The gun will be chambered in 7mm rem mag. I wanna shoot 140-168 grain bullets. What twist rate do I need?
  2. M

    Gunsmithing Rock barrel?

    Thinking of purchasing a rock creek barrel with 5r rifling for a 7mag I am going to have built. Any experience or advice about mike rocks barrels.
  3. M

    Help with my AR-10T

    Just purchased a New Armalite AR-10TBNF 20" SS Barrel. I have many bolt guns however this is my first "black" gun. I went through the breakin process Armalite suggested. After thourough cleanings the gun will cycle about 5 rounds then begins to short stroke, not picking the next round up and...