Barrel twist rate 16.5” MR555A1 Comp
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Thread: Barrel twist rate 16.5” MR555A1 Comp

  1. #1
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    Default Barrel twist rate 16.5” MR555A1 Comp

    Working on some new loads and have forgotten the twist rate on a stock MR556A1 comp rifle with the 16.5” barrel. TIA

  2. #2
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    I pretty sure they're all 1:7

  3. #3
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    Thanks. I finally found it in the product catalog. 1:7.

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