I have a Encore SS .50 cal muzzleloader. I had the .50 barrel off and was in my basement. Well our basement flooded while we were on vacation and the barrel got wet. Six days later we came home to find the mess. I laid the barrel on the self and started to clean the basement up. About a two weeks later I remember that my barrel got wet and needed clean. I swap the barrel and removed the breech plug. And what would you know the barrel pitted at the end of the barrel. Probably the last 3" inches of the barrel has rust pits in it. I thought the SS grade TC used was rust resistant?

Is the barrel done or will it be ok?