Barrels vary in thickness at different points. They are often draw files after brazing and installation of the top and bottom rib, so they can end up thinner in some spots.

According to Brit methods, the barrel wall thickness is measured 9" ahead of the end of the chamber. I like to see 25 thousandths to 30 thousandths. Some 2" 12 gauge guns are below 18 thousandths...


C Man
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