Metal shavings in distributor at pickup coil. Car running rough, lights dimming...

The reluctor and distributor shaft seem fine/no wobble. But the pickup coil that I replaced never really sat perfectly parallel to the fins on the reluctor, which may have led to rubbing, and thus the shavings. Voltage regulator is new. Battery is pretty new and tested. Alternator was replaced a few years ago. Is it these shavings in the distributor? Has anyone had this metal shavings problem specifically and if so, what were your symptoms and what did you do to fix it? Thanks!