Have not reloaded in years and not familiar with 700X and its corrosive properties. I do know black powder can be very corrosive and should be cleaned often and then cleaned some more. I always thought the so called modern powders would not harm the barrels. Yep they might be dirty but maybe not harmed by the residue. I am always amazed when looking at used guns at even some high end gunshops and the barrels are sometimes dirty.
Having a dirty gun even overnight gives me the willies.
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