Two otrher methods came to mind.
1. Drill primer pocket out of fired case. Solder hose connection to case head. Attach hot water hose, and let it run, flushing salt out of barrel. Clean as you would having fired NC ammunition afterward. You had previously removed bolt from rifle.
2. Get bucket of hot soapy wated. Remove bolt. Stick muzzle into water bucker. Using a snug fitting patch on cleaning rod, rod will act like a suction pump, pulling hot water up barrel. This will flush our corrosive residue. Flush with clean water, ten clean as if fired NC ammunition.
Hot water is good for cleaning all sorts of things. Good luck.