Gus that is what I am hoping will be the case.
Sounds like you have a good plan to proof it once again.
I want to make an important distinction on barrels going through a regular house fire, due to what the barrels are made from and of course what ammo is used afterward.
Many folks don't realize that Barrels are not "hard," because if they were, they would shatter in use. Instead they are made of "tough" materials that withstand the pressures of the ammo used in them.
Steel barrels withstand the pressures of either BP or modern cartridges by what types of Alloy they are made from. Some barrel steels are fine for the lower pressures of black powder, but are not of the correct alloy to withstand modern ammo. Fire heated STEEL barrels CAN become a danger to shoot after a house fire with modern ammo depending on how the heat affected the steel. Also, the thinner the steel barrel, the more likely it can be dangerously affected by a house fire. Personally and as a general rule, I would never again trust a modern steel shotgun barrel after it went through a house fire.
Forged Iron barrels have little or no carbon or other alloys in them. Thus the basic metallurgy of the metal doesn't change when the metal is heated and cools. This is why comparatively thick walled Iron Rifle barrels won't normally be harmed in a fire other than perhaps some scale formed in the bore.
Gus