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Barrel question

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  • #1
    .45ACP1911jc
    Member
    • Apr 2014
    • 102

    Barrel question

    This little dot has never increased in size, shape of any form. It's a little marking that looks like from the forge process. What is this. Or called? There is nothing on the inside of barrel. 4140 forged chromium. Any guess ? It smooth if you run a paper clip over it. No sign of damage in the circle.
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    • #2
      Citadelonline
      Member
      • Sep 2009
      • 153
      Could be a Rockwell hardness test mark.
      sigpicNRA Life Member.

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        • #3
          Carcassonne
          Veteran Member
          • Jul 2012
          • 4897
          Originally posted by Citadelonline
          Could be a Rockwell hardness test mark.
          +1

          That is what I thought.

          When they test steel for hardness, they press a diamond into the steel to see how deep it penetrates. It leaves a round mark - usually in an inconspicuous place.




          .
          Be sure to ask your doctor if depression, rectal bleeding, and suicide are right for you.

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            • #4
              'ol shooter
              Veteran Member
              • Mar 2011
              • 4646
              See? It's a good thing.
              sigpic
              Bob B.
              (\__/)
              (='.'=)
              (")_(")

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                • #5
                  .45ACP1911jc
                  Member
                  • Apr 2014
                  • 102
                  You guys are smart!

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