Hello everyone! I need a bit of advice. I received a 10 gauge NEF Turkey gun that has been stored in a finished basement with no moisture control for a LONG time and the gun has paid the price. There is some light barrel surface rust that doesn't appear to have damaged the finish and then there is THIS damage at the muzzle end. Inside of the barrel looks good. Is this damage repairable and if it is, is it even worth the cost as the value of this gun cant be too high? Like I said this is a single shot 10 gauge NEF Turkey Gun Model SB2 Mag. No sentimental value to me. Any opinions are welcome and appreciated. Thanks!