There is weaken spot where the bulge happened. I could not fire a round through it again without some sort of protection. I just can not get used to the fact I have to line both tubes for a 1mm bulge or sleeve the barrels. But then again I will never shoot 20 and twelve bore in the same shooting fields ever, ever, ever again

VH2 The era of Damascus tube making was a high man hour intensive process and the tubes where not circular as the forged fluid steels that come forth although they did they job and I believe in many respect better and safe proof with specific load. Run a bore gauge down a well made Belgium or English Damascus tube and the variation is considerable in the .01 range. Whereas fluid steel is concentric.

http://www.mathopenref.com/concentric.html

with the outside diameter if well struck. So it may be that trying to make aconcentric Damascus fit a concentric tube (Teague) indeed affect the macro properties of the original Damascus hand drawn tubes. IMHO the balance and feel is different. Ask me to do a double blind on it and I'll give you odds I can tell the diff between a lined and unlined tubes

RM Thanks for the insight and bettering the use of "is". It was bastardized wityh Bill. As I understand, MOI is a quantitative measurement. LOP, weight, fulcrum point etc, are qualitative measurements.Combining I understand MOI better if you are saying that there is neither a good nor bad MOI or that "Best Guns" must have this MOI range where as a Beesley, Hollis or Midland have different MOI thus lower on the totem pole or a bad MOI feels bad then I am confused. If you desire a MOI and reverse enginee to weapon what are you creating. I am very interested in covariance and if I didn't have to go trout fishing this next couple of days I'd would jump in.

I will approach you again about the determinant value of MOI