I just measured my 12ga DH Damascus # 94555. I do not have a wall thickness gauge so I measure inside and outside and do the math. Right barrel at 4.125 " in is .202 & 6" in is .132 ,left barrel at 4.125 " in is .209 & 6" in is .134 . I have been hunting with this gun for 4 years using RST 1oz paper. Sorry forgot to divide by 2 . So it's .101 , .066 & .105 , .067
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