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  1. R

    determining the straightness of a bore

    Newly purchased Colerain swamped barrel, 42", .40 cal, "A" wt. definitely curves a little to the right, as you sight down the barrel. looking down the bore, it appears to follow the same slight bend, but it may be my imagination. How can I determine the straightness of the bore?
  2. R

    determining the straightness of a bore.

    Newly purchased Colerain barrel: 42" .40 "A" wt. swamped barrel, outwardly bowed a bit to the right. How do I determine if the bore is straight? It appears to bow the same, but might be my imagination. Thanks for help!
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