Talked to Briley this morning. To fit my 16 G hammer gun, they machine the tubes to fit the bore. Chambers have to be 2 & 3/4 inch, tubes index depth on the front of the chamber. Fitting 190 dollars over the cost of Tubes. This is not needed on a number of modern factory guns, others it is needed. Short or full length tubes same work required.
May get a 3rd opinion on my barrels . If posable watch the method used and examine through the bore scope myself.
William
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