Struck vs UnStruck
Around 1997, we weighed about 50 barrels, and compared the finished weight to that stamped on the barrel flats. We plotted finished against unstruck and plotted the best straight line through the points. It indicated that the average finished barrel weighed 85% of the unfinished barrel, but the amount filed away seemed to decrease with increasing serial number. This appeared as an early PP article; if I can find the text I'll send it to Robin to post.
As is usual there are big exceptions to the average. There are match weight two barrel two gauge sets that weigh the same. There are other two barrel sets with a pound of difference between two barrels of the same gauge. The weight of the barrel (and balance of the gun) is generally achieved by filing in the section between breech and fore end tip.
Best, Austin
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