So I tore it down last night. First to go were the scope and mount. Pulled the barreled action from the stock. The action and trigger were thick with old lubricant that had turned gooey. Pulled the trigger and soaked it in mineral spirits while I cleaned up the action. There was some surface rust on both sides of the barrel below the line of the stock; came right off with fine steel wool and gun oil. Did a basic disassembly of the bolt; the firing pin channel was also full of gunk. Once the action was properly cleaned, I set to work on the trigger. Flushed it out with spray degreaser and compressed air, then reinstalled and adjusted it. Now it breaks like glass right at three pounds. New DNZ mount is on order; should be here by the weekend ...