I recently had some accuracy problems with my .510 Texan..Upon inspection cleaning ..I shined a light down my Donny Emperior..Part or the screen had seperated and a single wire was hitting the slugs going through the moderator..I removed the wire and felt cleaned my barrel an accuracy restored..I shot at least 300 lbs of powder coated cast slugs through..The felt was pretty clogged in places and way heavier than it should be..After removing felt and screen i can tell any difference in noise level... Anyways check your Donny FL and see what is going on inside...