I was putting my shotgun away for the year (I hunt in a slug gun only area) and noticed that my slug barrel for my 870 has a small Scratch at the end of the barrel. It is pretty small but I can feel it with my finger. It is right on the end almost directly underneath the front sight. it sort of wraps around the outside of the end of the muzzle towards the inside of the barrel. It is literally on the end almost like someone tried to cut the barrel like a tube, but just scored it instead of cutting it.
I am wondering what if anything should I do about it, and about how much would you think it would cost to fix it if it can be fixed. thanks