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  1. rich4422

    Is this corrosion or a void in the metal?

    Thanks Ed! I really wanted cutting the barrel in half! LOL! What I did notice, when machining a light skim off the face, initially in the hope of clearing the pits off, just exposed more... That photo was of a really big one, but there are loads of tiny pits, even in the bore. The rest of...
  2. rich4422

    Is this corrosion or a void in the metal?

    Hello, I am looking for some opinions on marks I have seen, under the microscope, in a steel air rifle barrel. This black mark is approx 1mm by 0.5mm. I believe it's a void in the steel, exposed by machining and NOT corrosion. What do you think...

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