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British proof marks make a dent in the bore

Discussion in 'Gunsmithing and Repairs' started by Clark, Mar 29, 2003.

  1. Clark

    Clark Well-Known Member

    The three Brit proof marks on this S&W 1917 pistol all dented through to the bore. The last one was on thicker barrel, and is not so strong in the bore.

    Attached Files:

  2. Pistolsmith

    Pistolsmith Well-Known Member

    This is common to pistols and revolvers. If you will look inside the bore of Colt commemorative 7/8 replicated "revolvers", actually a single shot .22 short, you see a definite impression of the legend.
    When you slam steel type into a surface, the metal beneath it compresses and goes deep into the structure; this is why you can always raise a serial number or legend by applying muriatic acid.

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