I think the main issue in using a borescope effectively is interpreting the images as you see them. here are 2 images of the inside of a 6.5 Creedmmor barrel with a low round count. The directly down the barrel image looks like the inside of a drainpipe but the side view shows a different story. In those 1st images I posted I believe the bright spots were just the light of the borescope reflecting of either a small piece of copper fouling or a small imperfection on the barrel surface.
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