Oh, my Drew! You did throw in all the Techno speak but didnt you leave out one of the most important causes of barrel tube problems, the passion for home reloading on your side of the pond with all its associated human mistakes. I feel sure that incorrect cartridge reloading has been the end for many a fine Damascus barrelled gun. Also there does not seem to be taking responsibility of adjusting things to take note of the guns age, well grandfathers may have been extremely fit in their younger days but you would not expect the majority of them to run a half Marathon every week end and as for great great Grandfathers it does not warrant thinking about.
This gun is a hundred and fifty rears old British nitro proof , using the correct Brit cartridges recommended for the chamber length there is no reason in the world why the Damascus barrels should not go for an other hundred and fifty years. But cartridge reloading on this side of the pond is not a popular thing to do. Plus ready made cartridge manufacturers are extremely careful in their manufacturing process not wanting to see the inside of a court room for negligence. IMHO the largest problem you have on your side of the pond is the barrel reamer used to remove pitting with no enforceable barrel bore limits to keep to safe limits as we do here. Ream the barrel to within an inch of its life to remove pitting then take it out and use it now there is your time bomb. A sporting gun barrel bursting on this side of the pond is extremely rare and would make the national news with news hounds for the full story all over it like a rash.
