A couple years ago sent the barrels back to Browning to resolder the rib vent to the barrels. So wiping it down and removed the barrels to find the mechanization was rusting! The best I can tell just the for end inside parts are rusting . Any gun smiths out there?
The gun smith (blanking on his name) who works at the Indiana Gun Club in fishers is great. He is friendly and super knowledgeable. I would give them a call at (317) 485-6540.
When I was shooting there with a buddy, his gun was having a problem and we took it to him, he took it apart real quick, found the problem and put it back together. He is my recommendation.
+! for Bob at Indiana Gun Club. Was there shooting trap several weeks ago when one of my auto shotguns jammed and I could not figure out how to clear the action. I checked at the front desk. They told me to go see the gunsmith next door. I walked in explained what happened and he dropped what he was working on, took my shotgun and in less than 10 minutes we were good to go. Now that is friendly customer service!
Art's Gun Shop is widely recognised as the top smithing service for all things Superposed in the US, he and his son's have worked on several of my Superposed Browning's over the years and I wouldn't entrust them to anyone else.
Their restoration services are world class, take some time and watch the videos they host on the website you can find them here: Art's Gun and Sports Shop