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We have pretty high humidity in Minnesota at times, too. My dad's old Winchester 38-55 rusted really badly from sitting uncleaned for years (and unfired). I like to lubricate the gun with Shooter's Choice FP10 then lightly oil the barrel with Remington Oil. Anything that's going to be packed away for a longer period of time gets grease or thicker oil. Sometimes it can be like surface rust on brake rotors after a rain.. still not something anybody wants on their gun!
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